Every lab marker
we test, explained

Storage form of vitamin D; foundational deficiency screen.

Why it matters
Deficiency can be very common in women, can worsen bone loss, and may be associated with PMS, PCOS, preeclampsia, and breast cancer risk.

Higher levels
High vitamin D may come from taking supplements, more than from sun or food. Very high levels can cause vitamin D toxicity, which can raise blood calcium (hypercalcemia) and lead to kidney stones or calcium deposits in soft tissues. You may notice nausea, thirst, constipation, frequent urination or weakness, or you may have no symptoms. Biotin can interfere with some immunoassays too, so a clinician may review everything you take and check your calcium.

Lower levels
Low vitamin D may point to a deficiency or insufficiency, which can be very common. It can happen with little sun, darker skin, or gut conditions that limit absorption. Over time, low levels can add to bone loss, which can matter more around menopause, and vitamin D can help build a baby's bones and teeth in pregnancy. Tiredness, low mood or muscle and bone aches may appear, and some people may feel fine. Calcium and PTH results can add to the picture.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Vitamin D →

These notes provide context and do not diagnose a condition.

B12 status within a comprehensive panel.

Why it matters
Can be a common deficiency in women on metformin (PCOS), vegan diets, or with autoimmune gastritis; can affect energy, mood, and nerves.

Higher levels
High B12 may mean supplements, shots or fortified drinks, and that may not be a concern. It can also accompany liver disease or myeloproliferative disorders, which are bone marrow conditions that can overproduce blood cells. Kidney disease can raise it too. A high value by itself may cause no symptoms, and extra B12 can leave the body in urine. If no supplement is involved, a clinician may look at liver tests and a complete blood count.

Lower levels
Low B12 may point to true deficiency, especially with a high MMA. It can happen with a vegan diet, pernicious anemia (an autoimmune condition), acid-reducing medicines called PPIs, metformin, older age or weight-loss surgery. Some people may notice tiredness, numbness or tingling, a sore tongue, or changes in memory or mood. Pregnancy and birth control with estrogen can lower a B12 reading without a true shortage, so a clinician may add MMA when a result sits near the low end.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Vitamin B12 →

These notes provide context and do not diagnose a condition.

Folate inside red blood cells; can reflect long-term folate status better than serum folate.

Why it matters
Essential preconception and in pregnancy to prevent neural tube defects; RBC folate can be a useful measure of stored folate.

Higher levels
High RBC folate may mean long-term good folate status, or regular use of folic acid, prenatal vitamins or fortified foods. Because red cells can live for a few months, this level can stay up for a while after intake changes. It may not be a concern on its own, and it can be an expected result when preparing for pregnancy. Large amounts of folic acid can hide the anemia of low vitamin B12, so a clinician may check B12 too. A recent blood transfusion can also sway this test.

Lower levels
Low RBC folate may point to a longer-term folate shortage (folate deficiency), and it can be more reliable than serum folate, which can swing with recent meals. It can happen with low intake, alcohol use, methotrexate, gut absorption problems or MTHFR gene variants. Low B12 can also lower this result. Folate can help a baby's brain and spine form in the first weeks of pregnancy, and needs can rise during pregnancy. Some people may notice tiredness, pale skin, mouth sores or shortness of breath, and others may have no symptoms.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Folate (red blood cell) →

These notes provide context and do not diagnose a condition.

Current circulating folate; can reflect recent intake.

Why it matters
Critical for women of reproductive age — adequate folate before conception can dramatically reduce neural tube defect risk.

Higher levels
High serum folate may mean recent folic acid supplements, prenatal vitamins or fortified foods, such as enriched bread and cereal. It can climb soon after a meal, so timing can sway it. A high value may not be a concern on its own. Low vitamin B12 can also raise serum folate, because cells can't use it properly, and large amounts of folic acid can hide B12 anemia. A damaged sample can raise the result too, since red cells can leak their folate into the serum.

Lower levels
Low serum folate may point to low recent intake or malabsorption. Because this test can swing with what you've eaten over the last few days, one low result may not mean a long-term shortage. It can happen with alcohol use, celiac or other gut conditions, medicines such as methotrexate, or pregnancy, when needs can rise. Having enough folate before conception can help protect a baby's developing brain and spine. Some people may notice tiredness or mouth sores, and low folate can cause anemia. An RBC folate or B12 test can give a longer view.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Folate (serum) →

These notes provide context and do not diagnose a condition.

Essential mineral; deficiency can cause muscle cramps, fatigue, and arrhythmia.

Why it matters
Magnesium deficiency may be common in PMS, migraine, pregnancy, and menopause.

Higher levels
High magnesium (hypermagnesemia) can result from supplements, overuse of magnesium antacids or laxatives, kidney failure or adrenal insufficiency. Magnesium given through an IV for preeclampsia in pregnancy can also raise it. Mild rises may cause no symptoms, while larger rises can bring nausea, flushing, muscle weakness, drowsiness or a slow heartbeat. A clinician may check your kidney function and ask about supplements and anything you take for constipation or sleep.

Lower levels
Low magnesium (hypomagnesemia) can happen with proton pump inhibitors, alcohol, water pills (diuretics), vomiting or diarrhea, or poor intake. Most magnesium sits in your bones and cells, so a blood test can miss a shortage. You may notice muscle cramps, tiredness or an irregular heartbeat (arrhythmia), or no symptoms at all. Low magnesium may be linked to migraines, which are more common in women, and it may come up with PMS, pregnancy and menopause. It can also pull down potassium and calcium, so a clinician may check those too.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Magnesium →

These notes provide context and do not diagnose a condition.

Magnesium inside red cells; may reflect long-term tissue stores better than serum magnesium.

Why it matters
May be more sensitive for chronic deficiency — useful when serum magnesium looks normal but symptoms (PMS, migraine, cramps) persist.

Higher levels
High RBC magnesium can reflect supplement use or a steady, healthy intake of magnesium over time. This test looks inside red blood cells rather than in the fluid part of your blood, so it may not match a standard serum result. Magnesium antacids and laxatives can add to your intake, and kidney disease can make extra magnesium harder to clear. A high value may not be worrying by itself, and you may feel nothing. If you take magnesium for migraines, cramps or PMS, a clinician may want to know how much.

Lower levels
Low RBC magnesium may mean your body's magnesium stores are running low (tissue-level deficiency), even when a standard serum result looks normal. It can happen with long-term poor intake, alcohol, water pills (diuretics), proton pump inhibitors or ongoing stomach and bowel losses. Some people may notice muscle cramps or tiredness, and low magnesium may be linked to migraines and PMS in women. There is no single perfect measure of magnesium, so a clinician may read this result with your symptoms and serum level.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Magnesium (red blood cell) →

These notes provide context and do not diagnose a condition.

Amino acid; elevated levels may suggest B-vitamin deficiency (B12, folate, B6) and can increase cardiovascular and stroke risk.

Why it matters
Elevated homocysteine may be associated with recurrent miscarriage, neural tube defects, and pregnancy complications.

Higher levels
High homocysteine may point to low vitamin B12, folate or B6, or to kidneys that aren't clearing it well. It can add to the risk of heart disease and stroke, and it may be linked with pregnancy complications, so a clinician may look at it before pregnancy. Smoking, older age and rare inherited conditions can raise it too. A protein-rich meal before the draw can nudge the number up. If B12 is low, you may notice tiredness or numb, tingling hands and feet.

Lower levels
Low homocysteine may be reassuring, and it can be uncommon. It may need no follow-up on its own, because the worry with this marker can sit at the high end. Levels can fall during a healthy pregnancy, and folic acid or other B vitamins can bring it down as well. A low value can't show that every B vitamin is at a healthy level, so B12 or folate may still be worth checking if you feel tired or tingly.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Homocysteine →

These notes provide context and do not diagnose a condition.

Essential trace mineral involved in insulin sensitivity and glucose metabolism.

Why it matters
Has been studied for insulin resistance and gestational diabetes — though evidence is mixed, deficiency may worsen glucose control.

Higher levels
High blood chromium may mean exposure through work, such as metal plating, leather tanning or welding, or wear from certain orthopedic implants, including metal hip replacements. Supplements can add a little too. Heavy workplace exposure can irritate the skin, nose and lungs, and very high levels can harm the kidneys and liver, while some people may have no symptoms. Hip pain or swelling can be part of the picture with an implant, and a clinician may check cobalt as well. Needles and standard collection tubes can contaminate a sample, so an unexpected high may be repeated.

Lower levels
Low chromium may be linked to trouble handling blood sugar (impaired glucose tolerance), though studies can disagree and the link isn't settled. A blood level can't reliably tell you if you get enough from food, because the amount in blood can be so tiny. Trouble using insulin can happen with PCOS and with diabetes in pregnancy, which is why chromium can come up, but a low value alone may not explain it. True chromium shortage may be rare, and a clinician may look instead at A1c, fasting glucose or insulin.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Chromium →

These notes provide context and do not diagnose a condition.

Trace metal; component of vitamin B12 and marker of joint implant wear from metal-on-metal prostheses.

Why it matters
Relevant in younger women with hip implants planning pregnancy, since cobalt crosses the placenta.

Higher levels
High blood cobalt may mean wear from a metal-on-metal hip implant, where tiny bits of metal can get into the blood. It can also happen with work around hard metals, pigments, batteries or mining. Implant problems may be reported more in women than men. Very high levels can affect the heart, thyroid, nerves, hearing or vision. Some people may notice hip pain or swelling, and others may have no symptoms. Cobalt can cross the placenta, which may matter for younger women with hip implants who are planning a pregnancy.

Lower levels
Low cobalt may be normal, and it may not be a concern on its own. Your body can use cobalt only as part of vitamin B12, so there's no separate need for it. Meat, fish, eggs and dairy can supply that B12. A low value can't tell you about your B12 status, which is checked with its own test. For someone with a metal hip implant, a low result may be reassuring about metal wear, although a clinician may still follow symptoms or imaging.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Cobalt →

These notes provide context and do not diagnose a condition.

Antioxidant essential for mitochondrial energy production; can be depleted by statins and age.

Why it matters
Increasingly used in fertility care — emerging evidence may suggest CoQ10 supports egg quality in women trying to conceive, especially over 35.

Higher levels
High CoQ10 may mean you take a CoQ10 or ubiquinol supplement, which can raise blood levels well above your usual baseline. Because CoQ10 can travel in the blood with LDL cholesterol, high cholesterol can raise the reading too. A high value from supplements may not be a concern on its own, though some people may notice mild stomach upset from them. CoQ10 can come up in talk about energy and fertility, but research on both is still early. Your cholesterol and what you take can both help explain this result.

Lower levels
Low CoQ10 may happen with statin use, aging, heart failure and several mitochondrial conditions, where cells can struggle to make energy. Your body makes its own, and levels can fall with age. Statins can lower CoQ10 because they can act on the same pathway and lower the cholesterol that carries it. Some people may notice tiredness or muscle weakness, though these can have many other sources. Research on CoQ10 and fertility is still early and testing isn't routine, so a clinician may read this result next to your medicines and symptoms.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Coenzyme Q10 →

These notes provide context and do not diagnose a condition.

Essential trace mineral; deficiency can cause anemia and neuropathy, and copper can build up in Wilson's disease.

Why it matters
Estrogen can raise copper levels (pregnancy, OCPs); imbalance can affect iron metabolism and may be linked to fatigue.

Higher levels
High copper may appear with inflammation, infection or pregnancy, because copper can rise along with ceruloplasmin, the protein that carries it. Oral estrogen can raise it too, so levels can be higher on birth control that contains estrogen. Wilson's disease, a rare inherited condition, can make copper build up in the liver and brain, and blood copper may be high or low with it, so a clinician may add a ceruloplasmin test, which can run low with it. Too much copper from supplements or water can cause nausea, vomiting or belly pain, and some people may have no symptoms.

Lower levels
Low copper may result from too much zinc from supplements, trouble absorbing nutrients (malabsorption), or rare genetic conditions such as Menkes disease. Weight-loss surgery can raise the risk. Low copper is uncommon, but it can cause anemia and nerve problems, and some people may notice tiredness, numbness, tingling or unsteady walking. Copper can run higher on estrogen, so a low level in pregnancy or on estrogen-containing birth control may stand out more. A ceruloplasmin or zinc test can add useful context.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Copper →

These notes provide context and do not diagnose a condition.

Copper inside red cells; may be more reflective of tissue stores than serum copper.

Why it matters
May be a better measure of true copper status in women on oral contraceptives or in pregnancy when serum copper can be artificially elevated.

Higher levels
High RBC copper may point to more copper stored in the body, and it can help clarify copper status when serum results are unclear. Copper supplements or copper in drinking water can add to it. Estrogen can raise copper in the liquid part of your blood, so this test may be less swayed by pregnancy or birth control than serum copper. Too much copper can cause nausea, vomiting, belly pain or diarrhea, and some people may have no symptoms. A clinician may read it next to serum copper, ceruloplasmin and liver tests.

Lower levels
Low RBC copper may point to depleted tissue stores, even when serum copper looks normal. This may matter in pregnancy or on estrogen-containing birth control, since estrogen can lift serum copper and hide a shortfall. It can happen with too much zinc, malabsorption or weight-loss surgery. Low copper is uncommon, but it can cause anemia and nerve problems, and some people may notice tiredness, numbness or trouble with balance. A complete blood count and ceruloplasmin can help fill in the picture.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Copper (red blood cell) →

These notes provide context and do not diagnose a condition.

Serum iodine; can reflect very recent intake and supplementation.

Why it matters
Both deficiency and excess can affect thyroid function critical to pregnancy; a blood level can mainly reflect recent intake.

Higher levels
High iodine may mean recent intake from supplements, seaweed or kelp, iodine-containing contrast dye used for CT scans, or the heart medicine amiodarone. Iodine antiseptics can add to it as well. Because a blood level can mostly track very recent intake, one high result may not match your usual diet. Too much iodine can upset the thyroid and can cause an underactive or overactive thyroid, and this can matter during pregnancy. Contrast dye can keep the level up for weeks, so a clinician may ask about recent imaging and check TSH.

Lower levels
Low iodine may mean your recent intake has been low, and over time too little iodine can reduce how much thyroid hormone your body makes. That can cause goiter, a swollen thyroid, or an underactive thyroid (hypothyroidism). Needs can rise during pregnancy and breastfeeding, and too little can cause developmental delays in a baby. It can happen with diets low in iodized salt, dairy, eggs and seafood, and some prenatal vitamins may not contain iodine. A blood level can change with recent intake, so TSH or a urine iodine test can give a steadier view.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Iodine →

These notes provide context and do not diagnose a condition.

Manganese as part of a comprehensive trace metal assessment.

Why it matters
Both deficiency and excess can affect mood and bone health; included in functional medicine panels.

Higher levels
High manganese may mean exposure through work, such as welding or mining, or chronic liver disease, since the liver normally clears it. Some well water can contain extra manganese, and long-term IV nutrition can raise it too. Low iron stores can increase how much manganese your body absorbs, which may matter for women with heavy periods. Over time, buildup can affect the brain and nerves, with shakiness, stiffness, slow movement or mood changes. Some people may have no symptoms, and liver tests or a look at your water can help find the source.

Lower levels
Low manganese may be uncommon and can be clinically silent, with no symptoms at all. Most people can get plenty from whole grains, nuts, beans and tea. High iron intake can compete with manganese for absorption, though a low reading may not be a concern on its own. Your bones and energy use can depend on manganese, but true shortage may be rare, and there's no well-established women-specific reason to check it. One value may not mean much, and a repeat test can help before reading into it.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Manganese →

These notes provide context and do not diagnose a condition.

Can rise with B12 deficiency before serum B12 falls; may offer more sensitive detection of true deficiency.

Why it matters
Can be useful in women with low-normal B12, on metformin (PCOS), vegan diet, or with unexplained neuropathy or fatigue.

Higher levels
High methylmalonic acid (MMA) may point to low vitamin B12 (B12 deficiency). MMA can be a sensitive marker, and it can rise before serum B12 looks low. It can happen with a vegan diet, weight-loss surgery, pernicious anemia (an autoimmune cause of low B12), or metformin, a medicine used for diabetes and PCOS. Kidney disease can also raise MMA, as can older age and a rare inherited condition. Some people may notice tiredness, numbness, tingling, or changes in memory or mood, and others may have no symptoms. A clinician may read MMA next to B12, homocysteine and kidney tests.

Lower levels
Low methylmalonic acid (MMA) may make a functional B12 shortage less of a concern, since MMA can build up when cells run short of B12. A low value itself may not be a concern, and it can be reassuring when B12 sits near the low end, including for women on metformin or a vegan diet. Recent B12 shots or supplements can also bring MMA down. Numbness, tiredness or mood changes can have other explanations, so a clinician may look at iron, thyroid and folate tests if symptoms continue.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Methylmalonic acid →

These notes provide context and do not diagnose a condition.

Selenium status — important for thyroid function and antioxidant defense.

Why it matters
Selenium is a thyroid cofactor; deficiency may worsen Hashimoto's thyroiditis, which is far more common in women.

Higher levels
High selenium may mean supplement use, or a diet rich in Brazil nuts, which can contain very large amounts. At very high levels, selenium toxicity (selenosis) can cause hair and nail loss and stomach or gut issues. Some people may also notice a garlic smell on the breath, a metallic taste, tiredness or irritability. Thyroid-support blends can contain selenium, so a high level can appear in women managing Hashimoto's. Amounts from several supplements can stack up faster than you'd expect.

Lower levels
Low selenium may slow the step that turns thyroid hormone T4 into T3, and it can weaken the body's antioxidant defense. It can happen with a poor diet or in regions with selenium-depleted soil, and gut conditions, dialysis or recent illness can lower it too. Selenium deficiency may worsen Hashimoto's thyroiditis, which can affect women far more than men, although how much selenium helps is still being studied. Some people may notice tiredness or muscle weakness, and thyroid tests can help check how the gland is doing.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Selenium →

These notes provide context and do not diagnose a condition.

Vitamin A within a comprehensive nutrient panel.

Why it matters
Vitamin A excess can be teratogenic — a preconception review of supplements can matter; deficiency can affect eye health and immunity.

Higher levels
High retinol (vitamin A) may mean supplement use, such as high-dose vitamin A or cod liver oil, or frequent meals of liver. Too much vitamin A (hypervitaminosis A) can be serious and can damage the liver. Too much early in pregnancy can cause birth defects, so a clinician may review supplements before conception. Some people may notice headaches, nausea, dizziness, dry skin or hair loss. Kidney disease and birth control with estrogen can raise retinol as well, and a recent meal can sway the result.

Lower levels
Low vitamin A may impair vision, especially in low light, along with skin and the moist linings of the eyes and gut, and immune function. It can happen with a very limited diet or conditions that hamper fat absorption, such as Crohn's disease, celiac disease or weight-loss surgery. Infection or inflammation can lower it for a while, and breastfeeding can raise your needs. Some people may notice trouble seeing at night, dry eyes or more infections. A clinician may check retinol again once any illness has passed.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Vitamin A (retinol) →

These notes provide context and do not diagnose a condition.

Thiamine status within a nutrient panel.

Why it matters
Deficiency can cause hyperemesis gravidarum complications (Wernicke's) and can be common in bariatric surgery patients.

Higher levels
High thiamine may mean you take a supplement, including B-complex vitamins or a multivitamin, and it may not be toxic in healthy people. Extra thiamine can leave the body in urine, so a high level can settle once intake changes. A recent thiamine shot or IV can raise it sharply, which may be expected after treatment for severe vomiting in pregnancy or after weight-loss surgery. A high level by itself may cause no symptoms.

Lower levels
Low thiamine (vitamin B1) may happen with long-term heavy drinking, malnutrition, severe vomiting in pregnancy (hyperemesis gravidarum), or after weight-loss surgery. Very low levels can cause Wernicke's encephalopathy, a brain emergency that can bring confusion, unsteady walking and eye movement problems. Some people may notice tiredness, irritability, poor appetite or numb feet. The body can store only a small amount, so levels can drop within weeks of poor intake. With severe vomiting, a clinician may act on symptoms before results come back.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Vitamin B1 (thiamine) →

These notes provide context and do not diagnose a condition.

Cofactor for many enzymes and energy production.

Why it matters
Riboflavin can reduce migraine frequency — particularly relevant for women, who have 3x higher migraine rates.

Higher levels
High riboflavin may mean you take vitamin B2 on its own or in a B-complex, and it may not be toxic. Extra riboflavin can leave the body in urine, which can turn it bright yellow, and that may be harmless. Some people take riboflavin for migraines, so a high value may simply match that routine. A dose taken shortly before the test can raise the reading. There may be no symptoms at all from a high value.

Lower levels
Low riboflavin may occur with heavy alcohol use, malnutrition or certain medicines. It can also happen if you eat little dairy, eggs or meat, and needs can rise during pregnancy and breastfeeding. Some people may notice cracked skin at the corners of the mouth, a sore throat, a swollen tongue, itchy red eyes or skin rashes. Riboflavin can help your body put other B vitamins, like B6, to work, so a low level can come with shortfalls in those too. Testing other B vitamins can give a fuller view.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Vitamin B2 (riboflavin) →

These notes provide context and do not diagnose a condition.

Pantothenic acid status.

Why it matters
Cofactor in adrenal hormone synthesis — sometimes included in fatigue and stress evaluation panels.

Higher levels
High B5 may mean supplement use, including B-complex vitamins and blends sold for hair or skin. Toxicity may be rare, though very large amounts can cause diarrhea. Vitamin B5 is in almost every food, but diet alone may not push the level high. Extra B5 can leave the body in urine, so a high value may not be a concern on its own. There's no established women-specific reason to test it, so a high value may only point to your supplement routine.

Lower levels
Low B5 may be uncommon, because pantothenic acid can be found in almost every food. Severe deficiency can contribute to tiredness, and it can also bring numb or burning feet, headaches, irritability or poor sleep. It can happen with severe malnutrition, heavy alcohol use, or a health condition that limits how you absorb food. There's no established women-specific reason to test it, but a clinician may look at your whole diet and other B vitamins, since low B5 can appear alongside them.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Vitamin B5 →

These notes provide context and do not diagnose a condition.

Vitamin B6 within a nutrient panel.

Why it matters
Used in PMS, morning sickness, and homocysteine reduction — particularly relevant in women's health protocols.

Higher levels
High B6 may mean supplement use, including B-complex vitamins, energy drinks, or products taken for PMS or morning sickness. Long-term excess can cause nerve damage (peripheral neuropathy), with numbness, tingling or burning in the hands and feet, or trouble with balance. That can seem odd, because low B6 can affect nerves too. Nerve symptoms can ease once intake comes down, though recovery can take time. A clinician may review every product you take, since B6 can be in several at once.

Lower levels
Low B6 may happen with malabsorption, alcohol use, certain medicines or chronic disease, such as kidney disease or rheumatoid arthritis. Autoimmune conditions such as rheumatoid arthritis can be more common in women, and needs can rise during pregnancy and breastfeeding. Some people may notice cracked lips, a sore tongue, a skin rash, mood changes or tiredness from anemia. Inflammation can lower plasma B6, so a low value during an illness may not match your true stores. A complete blood count can help check for anemia.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Vitamin B6 →

These notes provide context and do not diagnose a condition.

Antioxidant and collagen cofactor; supports iron absorption and immune function.

Why it matters
Can enhance non-heme iron absorption — this may matter for menstruating women with iron deficiency.

Higher levels
High vitamin C may mean recent supplements, and it may be well tolerated. Very high doses can cause stomach upset or diarrhea, and they can raise the risk of kidney stones in some people. A recent IV vitamin C infusion, fruit juice or fizzy vitamin tablet can also lift the number. Very large doses can throw off some other lab tests, so a clinician may want to know the timing. Blood levels can settle quickly, because the kidneys can clear the extra.

Lower levels
Low vitamin C may impair collagen, immune function and antioxidant defense, and severe deficiency can cause scurvy. It can happen with smoking, a limited diet, heavy alcohol use or gut conditions, and needs can go up during pregnancy and breastfeeding. Some people may notice easy bruising, bleeding gums, tiredness, slow wound healing or joint pain. Vitamin C can help you absorb iron from plant foods, so a low level can matter if heavy periods have also lowered iron. Sample handling can sway this test, because vitamin C can break down quickly.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Vitamin C →

These notes provide context and do not diagnose a condition.

Zinc status within a comprehensive nutrient panel.

Why it matters
Zinc supports immune function, skin, and hormone production; can be a common deficiency in vegetarians and women on long-term OCPs.

Higher levels
High zinc may mean supplement use, including lozenges and cold remedies, and long-term high intake can interfere with copper absorption. Very high zinc can lower copper enough to cause anemia or nerve problems. Too much zinc can cause nausea, vomiting or stomach cramps, and some people may have no symptoms. Zinc denture creams can add to the total. A sample can also read falsely high if red cells break open or the tube isn't made for trace metals, so a clinician may repeat it and check copper.

Lower levels
Low zinc may affect immune function, wound healing, taste and skin health. It can happen with vegetarian or vegan diets, malabsorption, Crohn's disease or weight-loss surgery. Zinc needs can rise during pregnancy and breastfeeding, and long-term birth control pills can lower zinc a little. Some people may notice more infections, slow-healing cuts, hair loss or a dulled sense of taste. Illness, inflammation and time of day can also lower plasma zinc, so the timing of the draw can matter.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Zinc →

These notes provide context and do not diagnose a condition.

Zinc inside red cells; may be more sensitive for long-term status than plasma zinc.

Why it matters
May be a better measure of true zinc status when symptoms (hair loss, skin issues, immune problems) persist despite normal plasma.

Higher levels
High RBC zinc may mean supplement use or a steady, adequate intake over time. Because red cells can live for months, this result can stay up after a recent change in intake. Very high zinc can lower copper, so a clinician may check copper too, especially if anemia or nerve symptoms are part of the picture. A high value may not cause symptoms on its own. There's no single perfect test for zinc, so plasma zinc can add a second view.

Lower levels
Low RBC zinc may point to a longer-term shortfall, even when serum zinc looks normal. It can be more common if you eat little or no meat or seafood, have a gut condition like Crohn's disease, or have had weight-loss surgery, and needs can rise in pregnancy and breastfeeding. Some people may notice hair loss, skin issues or more infections. Those symptoms can have many other explanations, so this result may be read next to plasma zinc. Iron and thyroid tests can also matter when hair loss is the concern.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Zinc (red blood cell) →

These notes provide context and do not diagnose a condition.

Folate status as part of micronutrient panel.

Why it matters
Foundational for women of reproductive age — neural tube defect prevention starts before conception.

Higher levels
High folate may mean recent supplements or fortified foods, such as enriched bread and breakfast cereal. On a nutrient check, it can be an expected result for anyone taking a prenatal vitamin. A sample taken soon after a meal or vitamin can run higher. A high folate level itself may cause no symptoms, but high folic acid intake can mask the anemia of low B12 while nerve problems can keep going, so a clinician may read it with a B12 result.

Lower levels
Low folate may mean too little in the diet or trouble absorbing it (malabsorption). Leafy greens, beans, citrus and enriched grains can supply it, so a limited diet can bring levels down. Alcohol use, gut conditions and certain medicines can do the same. Folate can help a baby's brain and spine form early in pregnancy, so low folate may matter for anyone planning a pregnancy. Low folate can also cause anemia, a shortage of healthy red blood cells that can leave you tired or short of breath.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Micronutrient, Folate →

These notes provide context and do not diagnose a condition.

Iron status as part of a comprehensive nutrient panel.

Why it matters
Iron deficiency may be the most common nutrient deficiency in women globally — ask your clinician whether testing fits you.

Higher levels
High iron may point to inherited iron overload (hemochromatosis), recent supplements, the breakdown of red blood cells (hemolysis) or liver disease. Blood iron can swing through the day and after meals, so an iron pill or iron-rich meal before the test can raise it, and morning levels can be higher. Birth control with estrogen can also nudge it up. Periods can mask hemochromatosis, which can show up in women after menopause. Some people may notice tiredness or joint pain, and ferritin and transferrin saturation can help check whether stores are high too.

Lower levels
Low iron may point to iron deficiency, low intake or long-term inflammation. Heavy periods, pregnancy and childbirth can all draw on iron, and gut conditions such as celiac disease can limit absorption. Some people may notice tiredness, dizziness, pale skin, shortness of breath or restless legs, and others may have no symptoms. Iron can dip later in the day or with a recent illness, so one value may not tell the whole story. A clinician may read it with ferritin, TIBC and hemoglobin to check whether stores are low.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

These notes provide context and do not diagnose a condition.

Morning cortisol when levels peak; screens for adrenal insufficiency and Cushing's syndrome.

Why it matters
Cortisol dysregulation can be common in chronic stress, perimenopause, and can contribute to weight gain, sleep, and mood issues in women.

Higher levels
High morning cortisol may come from physical or emotional stress, depression, steroid medicines or Cushing's syndrome, when the body makes too much cortisol over time. Estrogen can raise the protein that carries cortisol, so pregnancy and birth control pills can push a total level up even when the adrenal glands are fine. With Cushing's, you may notice weight gain around the middle, stretch marks, easy bruising or changes in your periods. One morning result can't settle the question, so a clinician may add late-night saliva, urine or dexamethasone testing. Poor sleep and biotin supplements can also sway some cortisol tests.

Lower levels
Low morning cortisol may raise concern for adrenal insufficiency, when the adrenal glands can't make enough cortisol (Addison's disease) or the pituitary sends too little ACTH. Long-term steroid use can also quiet the body's own cortisol production, and that can stay true for a while after stopping. You may notice tiredness, dizziness, nausea, weight loss or salt cravings. A draw done later than the morning peak can read lower as well. To look closer, a clinician may follow up with an ACTH stimulation test.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Cortisol (AM) →

These notes provide context and do not diagnose a condition.

Steroid precursor that can help identify 11-beta-hydroxylase deficiency, a form of congenital adrenal hyperplasia (CAH).

Why it matters
Late-onset CAH in women can present as irregular cycles, acne, hirsutism, and infertility — symptoms often misattributed to PCOS.

Higher levels
High 11-deoxycortisol may point to 11-beta-hydroxylase deficiency, an inherited form of congenital adrenal hyperplasia (CAH) that can block the last step in making cortisol. When that step is blocked, the adrenal glands can make extra androgens, hormones like testosterone, and women may notice irregular periods, acne or extra facial hair. Some people with this condition can also have high blood pressure. Levels can also rise on purpose during a metyrapone test, which blocks cortisol production, so a high number may mean something different after that test.

Lower levels
Low 11-deoxycortisol may be expected on a routine blood draw, because this hormone can stay low unless a metyrapone test has been done. On its own, a low baseline result may not be a concern. After metyrapone, a level that stays low may mean the adrenal glands or pituitary aren't responding as they should, as in adrenal insufficiency. Tiredness, dizziness and weight loss can come with that condition. Steroid medicines can also lower adrenal hormones, so this result may be easier to read next to cortisol and ACTH.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about 11-Deoxycortisol →

These notes provide context and do not diagnose a condition.

Adrenal steroid intermediate; used to evaluate 3-beta-hydroxysteroid dehydrogenase deficiency and adrenal androgen production.

Why it matters
Can help differentiate adrenal from ovarian sources of androgen excess (acne, hair loss, hirsutism) in women.

Higher levels
High 17-hydroxypregnenolone may point to congenital adrenal hyperplasia (CAH), a group of inherited conditions that can change how the adrenal glands make hormones. A rare form called 3-beta-hydroxysteroid dehydrogenase deficiency can make this hormone build up behind a blocked step. In women, extra androgens, hormones like testosterone, can cause irregular periods, acne, thinning scalp hair or extra facial hair, which can look like PCOS. Because a mild rise can be hard to interpret alone, 17-hydroxyprogesterone and DHEA results can add useful context.

Lower levels
Low 17-hydroxypregnenolone may be expected, and it may not mean much on its own. This hormone is a stepping stone toward other hormones, so only a small amount can be present in the blood at any time. Steroid medicines such as prednisone can quiet the adrenal glands and may lower it further. A low value can't rule out other hormone problems, so irregular periods, acne or extra hair may still need a closer look.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about 17-Hydroxypregnenolone →

These notes provide context and do not diagnose a condition.

Primary screening test for non-classic congenital adrenal hyperplasia (NCAH) due to 21-hydroxylase deficiency.

Why it matters
NCAH affects ~1 in 1,000 women and often mimics PCOS with irregular periods, hirsutism, and infertility — testing distinguishes the two.

Higher levels
High 17-hydroxyprogesterone may point to classic or non-classic congenital adrenal hyperplasia (CAH), an inherited condition that can involve the 21-hydroxylase enzyme and lead to extra androgens. In women, non-classic CAH can look a lot like PCOS, and some may notice irregular periods, acne, extra hair growth or trouble getting pregnant. Levels can also run higher after ovulation and during pregnancy, and they can change through the day, so timing may sway the result. A clinician may repeat the test in the morning or add an ACTH stimulation test.

Lower levels
Low 17-hydroxyprogesterone may be a normal result and may need no follow-up. Levels can sit lower in the first half of the menstrual cycle and later in the day, because this hormone can swing with ovulation and the body's daily rhythm. Steroid medicines such as prednisone or dexamethasone can also lower it. A sample drawn in the afternoon can read low, so a low value then can't rule out a mild form of congenital adrenal hyperplasia (CAH), which can cause irregular periods or extra hair.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about 17-Hydroxyprogesterone →

These notes provide context and do not diagnose a condition.

Adrenocorticotropic hormone from the pituitary; distinguishes pituitary, adrenal, and ectopic causes of cortisol disorders. TEST

Why it matters
Helps work up Cushing's syndrome and adrenal insufficiency, both of which can disrupt menstrual cycles, fertility, and pregnancy.

Higher levels
High ACTH may mean your adrenal glands are getting a strong push to make cortisol, and the cortisol result can help explain why. High ACTH with high cortisol may point to Cushing's disease, from a growth on the pituitary, or to a growth elsewhere in the body that makes ACTH (an ectopic source). High ACTH with low cortisol may point to primary adrenal insufficiency (Addison's disease). Cushing's can bring weight gain around the middle, irregular periods or extra facial hair, while Addison's can bring tiredness, weight loss or darker skin. Stress and time of day can also sway ACTH.

Lower levels
Low ACTH with low cortisol may point to secondary adrenal insufficiency, when the pituitary doesn't send enough ACTH, or to long-term steroid medicines quieting the adrenal glands. Low ACTH with high cortisol may point to an adrenal growth making cortisol on its own (ACTH-independent Cushing's syndrome). After very heavy bleeding at childbirth, the pituitary can rarely be damaged (Sheehan syndrome), which may bring missed periods, trouble breastfeeding or tiredness. ACTH can also dip later in the day, which can make an afternoon result hard to read without a morning cortisol.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about ACTH →

These notes provide context and do not diagnose a condition.

Adrenal hormone regulating sodium, potassium, and blood pressure; high levels may suggest primary aldosteronism.

Why it matters
Primary aldosteronism can be an under-recognized cause of resistant hypertension in women.

Higher levels
High aldosterone may point to primary aldosteronism (Conn's syndrome), when the adrenal glands make too much of this hormone, or to another condition such as heart failure, liver scarring (cirrhosis) or a narrowed kidney artery (renal artery stenosis). It can come with high blood pressure that's hard to control, low potassium, muscle cramps or weakness, and some people may have no symptoms. Pregnancy can raise aldosterone, and so can a low-salt diet, standing before the draw, water pills or spironolactone. Renin, read alongside it, can help sort out why it's high.

Lower levels
Low aldosterone may occur with adrenal insufficiency, when the adrenal glands can't make enough hormones, or with selective hypoaldosteronism, when this one hormone runs short. It can come with high potassium, and dizziness on standing, tiredness or muscle weakness may follow. Blood pressure medicines such as ACE inhibitors or ARBs and a high-salt diet can also lower the result. Diabetes-related kidney disease can play a part too, and renin, potassium and cortisol results can help work out the reason.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Aldosterone →

These notes provide context and do not diagnose a condition.

Mass-spectrometry cortisol; can be more accurate than immunoassay, especially when other steroids are elevated.

Why it matters
Preferred during pregnancy, on hormone therapy, or with PCOS when standard immunoassays can be falsely elevated.

Higher levels
High total cortisol may point to physical or emotional stress, depression, heavy alcohol use, steroid medicines or Cushing's syndrome. Total cortisol counts the hormone bound to its carrier protein, so estrogen from pregnancy or birth control can raise the number without any adrenal problem. People with Cushing's may develop a rounder face, thin skin, muscle weakness or higher blood sugar. Mass spectrometry can tell cortisol apart from look-alike steroids, which can make a high result easier to trust. Even so, free cortisol in urine or saliva can add detail.

Lower levels
Low total cortisol may point to primary adrenal insufficiency (Addison's disease), secondary adrenal insufficiency from a pituitary problem, or long-term steroid therapy that can quiet the body's own production. Severe liver or kidney disease can lower the carrier protein and pull the total down too. Low cortisol can bring tiredness, low blood pressure, dizziness or darker skin. Afternoon samples can read lower than morning ones, and this precise method may read a bit lower than older tests. An ACTH stimulation test, which can check how the adrenal glands respond, may be the next step.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Cortisol, total →

These notes provide context and do not diagnose a condition.

Master precursor steroid that becomes all other steroid hormones.

Why it matters
Can decline with age — sometimes evaluated in fatigue and libido concerns common in midlife women.

Higher levels
High pregnenolone may come from taking pregnenolone supplements, which can raise blood levels. Rarely, it may point to an inherited enzyme problem in the adrenal glands, such as a form of congenital adrenal hyperplasia (CAH), where hormones can back up behind a blocked step. Levels can also run higher in pregnancy, because the placenta can make this hormone. Women with an adrenal enzyme problem may notice acne, extra hair or irregular periods. Because one value can say little alone, it may help most next to other hormone tests.

Lower levels
Low pregnenolone may be a normal finding, and levels can decline with age. It can also happen with adrenal insufficiency, when the adrenal glands can't make enough hormones, and tiredness, dizziness or weight loss can come with that condition. Steroid medicines such as prednisone can quiet the adrenal glands and may lower it too. A single low result can't say much on its own, and cortisol or DHEA results can add more.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Pregnenolone →

These notes provide context and do not diagnose a condition.

Pituitary hormone that controls the thyroid; first-line thyroid screen.

Why it matters
Thyroid disease is 5–10x more common in women, peaks postpartum and at menopause; TSH is the single most important screen.

Higher levels
High TSH may point to an underactive thyroid (primary hypothyroidism), such as from Hashimoto’s thyroiditis, an autoimmune condition. Slight elevations can be subclinical hypothyroidism, when thyroid hormone levels can still look normal. Thyroid problems can appear after pregnancy or around menopause, and pregnancy has its own ranges. Tiredness, weight gain, feeling cold, constipation or heavier periods may appear, and some people may have no symptoms. Time of day, recent illness and some medicines can sway TSH, so a clinician may repeat it with free T4.

Lower levels
Low TSH may point to an overactive thyroid (hyperthyroidism), from Graves’ disease, a toxic nodule or thyroiditis. Too much thyroid replacement can lower it, and so, rarely, can pituitary failure. In pregnancy, normal TSH can run a bit lower, so a result can be compared with pregnancy ranges. A racing heart, anxiety, weight loss, shakiness or lighter periods can follow. Biotin can make TSH read falsely low on some tests, and steroid medicines or serious illness can lower it too.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about TSH →

These notes provide context and do not diagnose a condition.

Biologically active form of T4; key thyroid hormone test alongside TSH.

Why it matters
Foundational thyroid test — autoimmune thyroid disease (Hashimoto's, Graves') is 5–10x more common in women.

Higher levels
High free T4 with low TSH may point to an overactive thyroid (hyperthyroidism), such as Graves’ disease, thyroiditis or too much thyroid replacement. Thyroid problems can appear after having a baby, and hCG in early pregnancy can raise free T4 for a short time. Biotin and the blood thinner heparin can sway some tests. You may notice a racing heart, anxiety, heat intolerance, weight loss or lighter periods, and these can be easy to blame on other things. A clinician may add thyroid antibodies to look for the reason.

Lower levels
Low free T4 with high TSH may point to primary hypothyroidism, an underactive thyroid, such as from Hashimoto’s thyroiditis. If TSH is low or normal, a low free T4 may suggest a pituitary problem instead. Free T4 can also drift lower later in pregnancy on some tests, and serious illness can lower it. You may notice tiredness, weight gain, feeling cold, constipation, dry skin or heavier periods. Because your baby relies on your thyroid hormone early on, a low level in pregnancy can matter.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Free T4 →

These notes provide context and do not diagnose a condition.

Biologically active thyroid hormone available to tissues.

Why it matters
Free T3 can clarify thyroid status when TSH and Free T4 disagree, especially in women with autoimmune thyroid disease.

Higher levels
High free T3 may point to an overactive thyroid (hyperthyroidism), from Graves’ disease, thyroiditis, too much thyroid replacement or T3 toxicosis, when free T3 can be high while free T4 stays normal. A thyroid flare after having a baby (postpartum thyroiditis) can push it up as well. A racing heart, sweating, shakiness, weight loss or lighter periods can appear. Biotin supplements can interfere with some free T3 tests, so a clinician may ask about them and check TSH.

Lower levels
Low free T3 may suggest an underactive thyroid (hypothyroidism), poor T4-to-T3 conversion, or non-thyroidal illness syndrome, when serious illness can lower T3 even though the thyroid is healthy. Fasting and very strict dieting can bring it down too. You may notice tiredness, feeling cold, dry skin or constipation. Because free T3 can stay normal for a while in an underactive thyroid, TSH and free T4 can tell more. A low value during an illness may recover with time.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Free T3 →

These notes provide context and do not diagnose a condition.

A sensitive antibody for autoimmune thyroid disease (Hashimoto's, Graves').

Why it matters
TPO antibodies in women may predict postpartum thyroiditis, miscarriage risk, and future hypothyroidism — a clinician may check them before pregnancy.

Higher levels
High TPO antibodies may point to Hashimoto's thyroiditis, an immune condition that can cause an underactive thyroid (hypothyroidism). They can also appear with Graves' disease and with thyroid inflammation after giving birth (postpartum thyroiditis). These antibodies can be present while TSH is still normal, and some people with them may not develop thyroid problems. Women with TPO antibodies may have a higher chance of thyroid changes after birth, and the antibodies may be linked to miscarriage, so a clinician may follow TSH closely before and during pregnancy. Some people may notice tiredness, feeling cold or a swollen neck (goiter), and others may have no symptoms.

Lower levels
Low or negative TPO antibodies may make autoimmune thyroid disease less of a concern, but they can't rule it out on their own. Some people with Hashimoto's may test negative, and thyroglobulin antibodies can occasionally be the only positive result. If TSH is still out of range, a clinician may look for non-immune reasons, such as thyroid medicine dose, iodine intake or recent illness. Antibody levels can fall during pregnancy, so a negative result in pregnancy may carry less weight. Before pregnancy, a negative result can be reassuring about thyroid changes after birth, though it can't exclude them.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about TPO antibodies →

These notes provide context and do not diagnose a condition.

Inactive form of T3; can rise with stress, illness, or extreme calorie restriction.

Why it matters
Elevated rT3 may explain hypothyroid-like symptoms despite 'normal' TSH — common consideration in women's functional thyroid evaluation.

Higher levels
High reverse T3 may suggest your body is converting less T4 into active T3 and making more of this inactive form. It can happen with stress, severe illness, fasting, chronic disease, strict dieting or intense training. Some medicines, such as amiodarone or steroids, can raise it too. You may feel tired, but that can come from many things, and reverse T3 on its own can rarely change the picture. Many clinicians may rely on TSH and free T4 first.

Lower levels
Low reverse T3 may not be a concern on its own, and it may go along with efficient thyroid hormone conversion. It can also occur with an underactive thyroid (hypothyroidism), when less T4 is around to convert. Because of that, a low value can’t tell you your thyroid is healthy. Tiredness or feeling cold can be worth raising if you notice them, since TSH and free T4 can give a clearer answer. Many people with a low reverse T3 may have no symptoms from it.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Reverse T3 →

These notes provide context and do not diagnose a condition.

Autoantibody that can be seen in Hashimoto's thyroiditis and after thyroid cancer treatment.

Why it matters
Hashimoto's is dramatically more common in women; antibodies can be present years before TSH changes.

Higher levels
High thyroglobulin antibodies may mean your immune system is reacting to your thyroid. They can appear with Hashimoto's thyroiditis, which can cause an underactive thyroid (hypothyroidism), and with Graves' disease, which can cause an overactive thyroid. These antibodies can show up years before TSH changes, and some people can carry them and not develop thyroid problems. After thyroid cancer treatment, they can interfere with the thyroglobulin blood test used to follow the cancer. A clinician may look at TPO antibodies, TSH and free T4 alongside this result, especially before pregnancy or after giving birth.

Lower levels
Low or negative thyroglobulin antibodies may make autoimmune thyroid disease (Hashimoto's or Graves') less of a concern, but this result can't rule it out on its own. Some people with Hashimoto's may have TPO antibodies and not these, so the two tests can work as a pair. Antibody levels can also shift over time, including during pregnancy. If thyroid symptoms or a high TSH remain a concern, a clinician may repeat the test or check TPO antibodies. After thyroid cancer treatment, a negative result can make thyroglobulin follow-up tests easier to read.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Thyroglobulin antibodies →

These notes provide context and do not diagnose a condition.

Hormone from thyroid C-cells; elevated levels may suggest medullary thyroid carcinoma.

Why it matters
Medullary thyroid cancer is rarer than other thyroid cancers but thyroid cancer overall is 3x more common in women.

Higher levels
High calcitonin may point to medullary thyroid carcinoma, a rare thyroid cancer that can run in families, and it can be monitored after thyroidectomy for that cancer. Other things can raise it too, including kidney disease, some acid-reflux medicines and C-cell hyperplasia, an overgrowth of the cells that make calcitonin. Normal levels can be lower in women than in men, so your result can be compared with ranges for women. Some people may notice a neck lump, hoarseness or trouble swallowing, and others may have no symptoms.

Lower levels
Low calcitonin may have no established clinical significance, and it may not be a concern on its own. Levels can run lower in women than in men, and they can be very low after your thyroid is removed (thyroidectomy). After treatment for medullary thyroid cancer, a very low level can be a reassuring finding that a clinician may keep tracking over time. A low value may not cause symptoms, and it can’t tell you how well your thyroid works.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Calcitonin →

These notes provide context and do not diagnose a condition.

Total triiodothyronine — active thyroid hormone in protein-bound and free forms.

Why it matters
Useful in pregnancy, on hormonal therapy, and in evaluating hyperthyroidism in women.

Higher levels
High total T3 may suggest an overactive thyroid (hyperthyroidism), such as Graves’ disease, as well as thyroiditis or too much thyroid hormone replacement. Pregnancy and estrogen, such as from birth control pills, can raise the proteins that carry thyroid hormone, which can push total T3 up even when your thyroid is fine. A racing heart, weight loss, shakiness or feeling hot may appear. Biotin can affect some thyroid tests, so a clinician may ask what supplements you take and look at TSH and free T4.

Lower levels
Low total T3 may occur with an underactive thyroid (hypothyroidism), severe illness (euthyroid sick syndrome) or starvation. Androgens and steroid medicines can lower the proteins that carry T3, so the total can read low even when your thyroid is fine. Fasting and hard calorie cutting can bring it down too, and a low value during an illness may pass as you recover. You may notice tiredness, feeling cold, constipation or heavier periods. TSH can say more about an underactive thyroid than T3 can.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Total T3 →

These notes provide context and do not diagnose a condition.

Older measure used to derive Free Thyroxine Index; largely replaced by direct Free T4.

Why it matters
Largely obsolete but occasionally needed when standard testing is unreliable, including in pregnancy.

Higher levels
High T3 uptake may suggest fewer open spots on the proteins that carry thyroid hormone. It can happen with low thyroid-binding globulin (TBG), the main carrier protein, as with steroids or androgens, or with an overactive thyroid (hyperthyroidism). Severe illness can sway it as well. If your thyroid is overactive, you may notice a racing heart, sweating or weight loss. This older test can’t stand alone, so a clinician may use it with total T4 or look at a direct free T4 test.

Lower levels
Low T3 uptake may suggest more open spots on the proteins that carry thyroid hormone. It can happen with estrogen, including pregnancy, birth control pills and menopause hormone therapy, even when your thyroid works normally. An underactive thyroid (hypothyroidism) can lower it too. If your thyroid is underactive, you may notice tiredness, feeling cold or weight gain, but with estrogen you may feel nothing unusual. This result can be read with total T4, or a clinician may prefer a direct free T4 test.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about T3 uptake →

These notes provide context and do not diagnose a condition.

Highly accurate Free T4 measurement by equilibrium dialysis.

Why it matters
Preferred in pregnancy and when binding proteins can be abnormal (on estrogen, OCPs, HRT).

Higher levels
High free T4 by direct dialysis may support a finding of hyperthyroidism, an overactive thyroid. This method can be most accurate when binding-protein abnormalities make standard free T4 unreliable, such as with inherited protein differences. The blood thinner heparin can falsely raise the result. A racing heart, shakiness or weight loss may go along with an overactive thyroid, and some people may notice very little. Your clinician may compare it with TSH, since the two can tell you more together.

Lower levels
Low free T4 by direct dialysis may support a finding of hypothyroidism, an underactive thyroid. It can be useful in pregnancy, when changing proteins can throw off standard tests, and when other free T4 methods give inconsistent results. Serious illness and some medicines can lower it too. Constipation, tiredness, feeling cold or heavier periods can come with it. Results can take longer than a standard test, and a clinician may read this one with TSH to see whether the thyroid or pituitary may be involved.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Free T4 (direct dialysis) →

These notes provide context and do not diagnose a condition.

TSH with automatic Free T4 if TSH is abnormal — efficient thyroid screening.

Why it matters
Optimal initial thyroid screen for women, especially preconception, postpartum, and at midlife.

Higher levels
High TSH may point to an underactive thyroid (hypothyroidism), because the pituitary gland can push harder when thyroid hormone runs short. On this test, a high TSH can trigger an added free T4 to help measure how much the thyroid is lagging. It can happen with Hashimoto's thyroiditis, thyroid changes after having a baby (postpartum thyroiditis), too little thyroid medicine, or medicines such as lithium or amiodarone. Some people may notice tiredness, feeling cold, constipation, weight gain or heavier periods, and others may have no symptoms. In pregnancy, a clinician may compare TSH with pregnancy ranges.

Lower levels
Low TSH may point to an overactive thyroid (hyperthyroidism), and on this test it can trigger an added free T4 to help gauge how severe that is. It can happen with Graves' disease, thyroid nodules, thyroiditis, or too much thyroid medicine. Normal TSH can run a bit lower in early pregnancy, so results may be compared with pregnancy ranges. Some people may notice a racing heart, shakiness, weight loss, feeling hot or lighter periods, and others may feel fine. High-dose biotin can make TSH read falsely low on some lab tests, and steroid medicines or serious illness can lower it too.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about TSH with reflex to free T4 →

These notes provide context and do not diagnose a condition.

Sequential thyroid testing — TSH first, then Free T4, then T3 or antibodies as needed.

Why it matters
Cost-effective thyroid workup for women given high prevalence of thyroid disease.

Higher levels
High TSH on this test may point to an underactive thyroid (hypothyroidism), and the lab can then add free T4, free T3 or thyroid antibody tests in steps. What it may mean depends on the full pattern: a low free T4 can fit an underactive thyroid, while a normal free T4 can fit a mild or early change (subclinical hypothyroidism). Positive antibodies may point to Hashimoto's thyroiditis. Thyroid conditions can affect energy, weight, mood, periods and fertility, and some people may have no symptoms. Recent illness, a change in thyroid medicine or thyroid changes after a baby can also push TSH up.

Lower levels
Low TSH on this test may point to an overactive thyroid (hyperthyroidism), and the same step-by-step add-on tests can follow. A low TSH can only be read with the full pattern: high free T4 or free T3 can fit an overactive thyroid, while normal levels can fit a mild change (subclinical hyperthyroidism). It can happen with Graves' disease, thyroid nodules, thyroiditis after having a baby, or too much thyroid medicine. Some people may notice a fast heartbeat, anxiety, weight loss or lighter periods. High-dose biotin can falsely lower TSH on some lab tests, and TSH can dip in early pregnancy.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Thyroid cascade (reflex testing) →

These notes provide context and do not diagnose a condition.

Protein on every atherogenic ('bad') particle (LDL, VLDL, Lp(a)); can be more predictive of cardiac risk than LDL-C.

Why it matters
Women's traditional lipid panels can underestimate risk; ApoB gives a truer particle count, especially around menopause.

Higher levels
High ApoB may mean you have more cholesterol-carrying particles in your blood, which can raise the chance of plaque, heart attack and stroke. It may be a stronger predictor of heart risk than LDL alone, because each particle that can clog arteries carries one ApoB protein. Inherited high cholesterol, insulin resistance, PCOS and an underactive thyroid (hypothyroidism) can raise it, and levels can climb around menopause. You may feel fine, since high ApoB can cause no symptoms for years.

Lower levels
Low ApoB may mean there are fewer artery-clogging particles in your blood, which can be a favorable sign for your heart. It can happen with cholesterol-lowering medicines, an overactive thyroid (hyperthyroidism), poor nutrition, severe liver disease or a rare inherited condition called hypobetalipoproteinemia. A low result may not be a concern on its own, especially if you take a cholesterol medicine. Blood pressure, smoking and blood sugar can still matter for heart risk.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about ApoB →

These notes provide context and do not diagnose a condition.

Genetically determined atherogenic particle that can independently raise heart and stroke risk.

Why it matters
Elevated Lp(a) can be an under-recognized cardiac risk factor in women, especially post-menopause when other lipids can worsen.

Higher levels
High lipoprotein (a), or Lp(a), may add to your risk of early heart disease and aortic stenosis, a narrowing of a heart valve, apart from your other cholesterol numbers. Your genes can set most of this level, so diet and exercise may not change it much. Levels can climb after menopause, and a standard cholesterol panel can't see it. You may feel fine and have healthy-looking results otherwise. A clinician may ask about early heart disease in your family and talk about testing relatives.

Lower levels
Low lipoprotein (a), or Lp(a), may be reassuring, and it may need no follow-up or treatment. Because your genes can set this level, one test may be all you need, even as other cholesterol numbers change. It can't cancel out other heart risks, though, so LDL, blood pressure, smoking and blood sugar may still matter. This result can be one more piece of your long-term heart picture, alongside your family history.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Lp(a) →

These notes provide context and do not diagnose a condition.

High-sensitivity CRP; cardiovascular inflammation marker at low ranges.

Higher levels
High hs-CRP may point to more inflammation in the body, and for heart health it may mean a higher risk of heart attack or stroke. Very high levels may suggest an active infection or significant inflammation that may need further testing. In women, elevated hs-CRP may independently predict heart attack and stroke risk, and it can go along with PCOS, insulin resistance and autoimmune disease. A recent cold or injury can raise it, and estrogen birth control can nudge it higher, so a clinician may repeat it once you're well.

Lower levels
Low hs-CRP may reflect minimal inflammation throughout your body and a low heart risk from inflammation. It may not call for any action on its own. A low result can't rule out heart disease, because cholesterol, blood pressure, smoking and family history can matter too. Regular movement, a whole-food diet, stress management and good sleep can help protect your heart. Statin medicines can lower hs-CRP, so a clinician may ask what you take.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about hs-CRP →

These notes provide context and do not diagnose a condition.

'Good' cholesterol; higher levels may protect against cardiovascular disease.

Why it matters
Estrogen can raise HDL — can be higher in premenopausal women than men, but can drop after menopause, which may contribute to rising cardiac risk.

Higher levels
High HDL may be a good sign, since HDL can help carry extra cholesterol to your liver. Estrogen can raise it, so levels can run higher before menopause, and regular exercise can lift it too. Extremely high HDL may not add more benefit, and a clinician may want to look into why it's so high, since genes or heavy alcohol use can play a part. A high value can't rule out heart disease, so it may be read with LDL and ApoB.

Lower levels
Low HDL may add to your risk of heart disease. It can come with insulin resistance, PCOS, high triglycerides, smoking or an inactive lifestyle, and these can cluster together as metabolic syndrome. Levels can drop after menopause as estrogen falls, and some medicines, such as anabolic steroids, can lower it too. You may feel fine, because low HDL can cause no symptoms. Blood sugar, triglycerides and waist size can help show the bigger picture.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about HDL-C →

These notes provide context and do not diagnose a condition.

Blood fat from diet and liver production; high levels can increase cardiac and pancreatitis risk.

Why it matters
Can rise in pregnancy, with estrogen therapy, with PCOS, and at menopause — important to monitor in women.

Higher levels
High triglycerides may mean your body is getting more carbohydrates, alcohol or calories than it can use right away. They can also go along with insulin resistance, obesity, an underactive thyroid (hypothyroidism) or inherited blood fat conditions (genetic dyslipidemias). In women, levels can rise during pregnancy, with PCOS, after menopause and with estrogen taken by mouth. High levels may cause no symptoms, but they can add to heart disease risk, and very high levels can raise the risk of pancreatitis. A recent meal can push the result up, so a clinician may ask for a fasting sample.

Lower levels
Low triglycerides may be a favorable result and may not be a concern on their own. Very low values can happen with malnutrition, such as during an eating disorder, or with an overactive thyroid (hyperthyroidism). Trouble absorbing fat from food and some cholesterol medicines can also lower them. If a very low level comes with weight loss, ongoing diarrhea or a racing heart, a clinician may look at your nutrition and thyroid results next.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Triglycerides →

These notes provide context and do not diagnose a condition.

Main protein in HDL ('good' cholesterol); higher levels may be cardioprotective.

Why it matters
Estrogen can raise ApoA1, so levels can drop after menopause — partial explanation for the rise in women's cardiac risk post-menopause.

Higher levels
High ApoA1 may be a good sign, because this main HDL protein can reflect a healthy HDL pool that helps move cholesterol out of your arteries. Estrogen can raise it, so levels can run higher in women than in men, and higher still in pregnancy or on estrogen birth control. Regular exercise can lift it a little as well. A high value can't cancel out other risks, such as high ApoB, high blood pressure or a family history of heart disease.

Lower levels
Low ApoA1 may add to your risk of heart disease, and it can come with insulin resistance, high triglycerides (hypertriglyceridemia), inflammation or smoking. Your genes can play a part as well, and rare inherited conditions can push it very low. Levels can drop after menopause as estrogen falls, which may be part of why heart risk can climb then. You may feel completely well, since low ApoA1 can cause no symptoms. ApoB and blood sugar results can add to the view.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Apolipoprotein A1 →

These notes provide context and do not diagnose a condition.

Released by stressed heart muscle; can be elevated in heart failure and can help differentiate cardiac vs. pulmonary reasons for shortness of breath.

Why it matters
Useful for peripartum cardiomyopathy and for distinguishing pregnancy-related dyspnea from heart failure.

Higher levels
High BNP may mean your heart muscle is stretched or under strain, as can happen with heart failure, fluid overload or a blood clot in the lung (pulmonary embolism). Higher values can track with a more serious outlook. Swelling, breathlessness and tiredness can occur, and in late pregnancy or after birth they may point to peripartum cardiomyopathy, a rare heart weakness. Levels can also rise with age, kidney disease and atrial fibrillation, and they can run a bit higher in women.

Lower levels
Low BNP may make heart failure less of a concern when someone is short of breath, though it can't rule out every heart problem. Carrying extra weight can lower BNP, so a result may read low even with some heart strain. Breathlessness can have other reasons too, including anemia, asthma or the normal changes of late pregnancy. If symptoms continue, a clinician may order an ECG or a heart ultrasound (echocardiogram).

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about BNP →

These notes provide context and do not diagnose a condition.

Sum of all cholesterol particles; broad cardiovascular risk indicator.

Why it matters
Pregnancy can raise total cholesterol well above usual levels; menopause can raise it. Trend matters more than single value in women.

Higher levels
High total cholesterol may point to a higher chance of heart disease and stroke over time, though it can be less specific than ApoB or an LDL particle count. Diet, family history, an underactive thyroid (hypothyroidism), diabetes and kidney disease can raise it. It can rise around menopause and climb naturally in pregnancy, so timing can matter. High HDL can also lift the total, and you may feel fine either way, since high cholesterol can cause no symptoms. LDL, HDL and triglycerides can give more detail.

Lower levels
Low total cholesterol may not be a concern on its own, and cholesterol-lowering medicines can bring it down on purpose. Very low total cholesterol can come with poor nutrition (malnutrition), an overactive thyroid (hyperthyroidism), severe liver disease or an inherited condition called hypobetalipoproteinemia. A serious recent illness can pull it down for a while too. With an overactive thyroid, you may notice weight loss, a racing heart or feeling hot. Thyroid and liver tests can help if the value is unexpected.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Total cholesterol →

These notes provide context and do not diagnose a condition.

Inflammation marker specific to vascular plaque; elevated levels can increase cardiovascular event risk.

Why it matters
Can refine cardiovascular risk in women with intermediate Framingham scores or after menopause when risk can rise.

Higher levels
High Lp-PLA2 activity may point to inflammation in your artery walls, and it can add to your risk of heart disease and stroke apart from your LDL level. Plaque can build up silently, so you may feel fine. This enzyme can travel on LDL particles, so high cholesterol can push it up too. Heart risk can climb after menopause, so this test may help when your other numbers leave your risk unclear.

Lower levels
Low Lp-PLA2 activity may be a favorable result, since it may mean less inflammation in your artery walls. It can't rule out heart disease, so cholesterol, blood pressure, blood sugar, smoking and family history may still matter. Statins and other cholesterol-lowering medicines can lower it, so a low result on treatment may partly come from that. It may be one small piece of a bigger heart-risk review, especially after menopause, when risk can start to climb.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Lp-PLA2 activity →

These notes provide context and do not diagnose a condition.

Oxidized LDL particles — more atherogenic than native LDL.

Why it matters
Refines cardiovascular risk in women, especially when standard lipids look normal but inflammation or PCOS is present.

Higher levels
High oxidized LDL (OxLDL) may mean more of your LDL, the so-called bad cholesterol, has been damaged by oxidative stress, a step that can help plaque form in your arteries (atherosclerosis). It can happen with high LDL, smoking, diabetes or metabolic syndrome, and it may run higher in some women with PCOS. LDL can rise after menopause, so this result may matter more at midlife. A high level may cause no symptoms, and a clinician may read this newer marker alongside your cholesterol panel and other heart results.

Lower levels
Low OxLDL may be a favorable result for heart health, since it can mean less of your LDL cholesterol has been damaged by oxidation. It may go along with low LDL overall, and cholesterol-lowering medicines can bring it down too. A low value can't rule out heart disease risk on its own, because blood pressure, smoking, diabetes and family history can still matter. Cholesterol can shift around menopause, so a past low result may not hold at midlife.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about OxLDL →

These notes provide context and do not diagnose a condition.

Gut-microbiome-derived metabolite linked to cardiovascular and kidney disease risk.

Why it matters
Emerging cardiovascular marker — relevant given women's underestimated cardiac risk and microbiome shifts at menopause.

Higher levels
High TMAO (trimethylamine N-oxide) may be linked to a higher risk of heart disease and kidney disease, though researchers are still learning how much it matters. It can build up when gut bacteria break down nutrients in red meat, eggs and dairy, and your liver then finishes the job. Fish can raise it for a short time, and reduced kidney function can slow how fast it clears. Gut bacteria may shift around menopause, and women's heart risk can be underestimated, so a clinician may read this with your cholesterol. You may not notice any symptoms from a high level.

Lower levels
Low TMAO may be a favorable result from a heart health standpoint. It can mean your gut bacteria are making less of it, which may happen with a diet lower in red meat, eggs and dairy. Recent antibiotics can also lower it for a while by changing your gut bacteria. A low result may need no follow-up on its own, but it can't replace your cholesterol and blood pressure results when a clinician looks at your heart risk.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about TMAO →

These notes provide context and do not diagnose a condition.

Small dense LDL particles — the most atherogenic LDL subtype.

Why it matters
Can be elevated in women with PCOS, metabolic syndrome, and at menopause despite normal total LDL — refines true cardiac risk.

Higher levels
High small dense LDL (sdLDL) may mean more of your LDL, or bad cholesterol, is carried in small, dense particles that can slip into artery walls and help plaque form (atherosclerosis). These particles can be more harmful than larger, fluffier LDL. High sdLDL can happen with insulin resistance, high triglycerides (hypertriglyceridemia) and metabolic syndrome, and it can turn up in women with PCOS or at menopause even when total LDL looks normal. You may not feel anything, but your triglycerides, blood sugar and cholesterol panel can help a clinician put it in context.

Lower levels
Low sdLDL may be a favorable result, and it may mean most of your LDL is carried in larger particles that can be less harmful. It may go along with healthy triglycerides and good insulin sensitivity, and cholesterol-lowering medicines can bring it down as well. A low value can't clear you of heart risk on its own, since total LDL, blood pressure, smoking and family history can still count. Cholesterol can change after menopause, so this number may shift with time.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about sdLDL →

These notes provide context and do not diagnose a condition.

Direct measurement of LDL cholesterol (vs. calculated); can be more accurate when triglycerides are high or after meals.

Why it matters
Can give better LDL accuracy in women with metabolic syndrome, PCOS, or pregnancy when triglycerides are elevated.

Higher levels
High direct LDL may point to a greater chance of plaque in your arteries (atherosclerosis), which can raise the risk of heart attack and stroke. Genes, diet, an underactive thyroid, diabetes and kidney disease can push it up, and it can climb around menopause. A healthy goal can depend on your overall risk, so a clinician may weigh blood pressure, family history and smoking too. This direct test can be more accurate when triglycerides run high, which can happen with PCOS and insulin resistance.

Lower levels
Low direct LDL may be favorable for your heart. Very low values can happen with high-intensity statin or PCSK9 inhibitor therapy, and they may be the goal of that treatment. Without those medicines, a very low level can come with an overactive thyroid, liver disease, poor nutrition or an inherited condition that lowers LDL. If nothing explains the number, a clinician may look for a reason with thyroid and liver tests.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Direct LDL →

These notes provide context and do not diagnose a condition.

Blood sugar level; foundational metabolic test.

Higher levels
High glucose can follow a recent meal, stress or illness, or it can reflect insulin resistance. A fasting value a little above the normal range may suggest prediabetes, and a higher value on repeat testing may suggest diabetes. PCOS and diabetes during pregnancy can raise your chances of high blood sugar later, and your risk can climb around menopause. Steroid medicines can raise glucose too. Some people may notice thirst, frequent urination, blurry vision or tiredness, and others may have no symptoms.

Lower levels
Low glucose (hypoglycemia) can cause shakiness, sweating or confusion. It can follow a long fast, intense exercise, alcohol or diabetes medicines such as insulin. Fasting glucose can also run a little lower in pregnancy. Hunger, a racing heart or a headache can happen as well, and very low levels can be dangerous. A blood sample that sits too long before it's processed can also read lower than your true level, so a clinician may repeat the test.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Glucose →

These notes provide context and do not diagnose a condition.

Average blood glucose over the past ~3 months; can help check for and monitor diabetes.

Why it matters
Used in PCOS screening, pre-pregnancy diabetes assessment, and gestational diabetes follow-up; less reliable during pregnancy itself.

Higher levels
High A1c may mean your average blood sugar over the past 3 months has been high, and a result above the lab's range may point to prediabetes or diabetes. PCOS and diabetes during a past pregnancy can raise this risk, and high blood sugar early in pregnancy can affect a baby's development. Iron deficiency, common with heavy periods, can push A1c up without any change in blood sugar. You may notice thirst, frequent urination or tiredness, or nothing at all. A clinician may repeat the test or check fasting glucose before drawing conclusions.

Lower levels
Low A1c may mean tight blood sugar control, or it can come from conditions that shorten the life of red blood cells, such as certain anemias, red cell breakdown (hemolysis) or recent bleeding. Pregnancy can also lower it, since red cells may turn over faster. A recent blood transfusion can sway the result as well. If you take diabetes medicines, a low A1c can go along with episodes of low blood sugar, so a clinician may want to review them. Fasting glucose or fructosamine may give a clearer picture.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about HbA1c →

These notes provide context and do not diagnose a condition.

Measures 1,5-AG, a sugar that can drop when blood glucose spikes; can reflect glucose excursions over the past 1–2 weeks.

Why it matters
Can be useful for women with PCOS, gestational diabetes risk, or early insulin resistance whose A1c looks normal but who still have post-meal glucose spikes.

Higher levels
High 1,5-AG (1,5-anhydroglucitol) may be uncommon and may need no action on its own, because clinicians can read this marker mainly through its lower range. A value in the upper range may mean your blood sugar has stayed below the point where sugar spills into urine over the past 1 to 2 weeks. It can't rule out diabetes or prediabetes, so a clinician may still look at your glucose and A1c. Pregnancy can change how the kidneys handle sugar, so results can be harder to read then.

Lower levels
Low 1,5-AG may mean your blood sugar has been spiking after meals enough to spill into urine, even when fasting glucose and A1c look controlled. It can reflect the past 1 to 2 weeks, a shorter window than A1c. PCOS and past diabetes in pregnancy can raise the chance of these spikes. Diabetes medicines that make the kidneys pass sugar (SGLT2 inhibitors), advanced kidney disease and pregnancy can also lower this result. High blood sugar may bring thirst and frequent urination, though many people may not notice spikes at all.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about 1,5-AG →

These notes provide context and do not diagnose a condition.

Hormone secreted by fat cells that improves insulin sensitivity and has anti-inflammatory effects; low levels may be linked to metabolic syndrome.

Why it matters
Can be low in women with PCOS independent of weight, which can contribute to insulin resistance and cardiovascular risk.

Higher levels
High adiponectin may go along with better insulin sensitivity and lower heart risk, and women can naturally run higher than men. Weight loss can raise it too. Very high levels can occur in chronic kidney disease, so a clinician may check your kidney function if the value looks unusual. You may feel nothing from a high result. This isn't a routine test, so its meaning can depend on your blood sugar and cholesterol results.

Lower levels
Low adiponectin may go along with obesity, insulin resistance, type 2 diabetes or metabolic syndrome. It can be low in women with PCOS, even apart from weight, and insulin resistance can become more common after menopause. Low adiponectin itself may cause no symptoms, though insulin resistance can come with darker skin patches, weight gain around the belly or irregular periods with PCOS. This specialized marker can't stand alone, so a clinician may look at your glucose, A1c and cholesterol too.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Adiponectin →

These notes provide context and do not diagnose a condition.

Byproduct of insulin production; distinguishes endogenous insulin (made by pancreas) from injected insulin and assesses beta-cell function.

Why it matters
Helps classify diabetes type in women with gestational or post-pregnancy diabetes and clarifies PCOS-related insulin dynamics.

Higher levels
High C-peptide may mean your pancreas is making a lot of insulin. With high blood sugar, it may point to insulin resistance or type 2 diabetes, and with PCOS, insulin resistance can push the pancreas to make extra. With low blood sugar, it may point to an insulin-making tumor (insulinoma) or to certain diabetes pills. Reduced kidney function can also raise it, because the kidneys help clear it, and a recent meal can push it up. A glucose result from the same sample can make this number much easier to read.

Lower levels
Low C-peptide may mean your pancreas is making little insulin, as can happen with type 1 diabetes or when insulin-making cells wear out in long-standing diabetes (beta-cell exhaustion). If diabetes turns up during or after pregnancy, this result may help tell the kinds of diabetes apart. Long fasting can lower it, and low blood sugar with low C-peptide may point to insulin coming from outside the body. You may notice thirst, frequent urination or weight loss if insulin is running short. Glucose and diabetes antibody tests can help a clinician sort out the type of diabetes.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about C-peptide →

These notes provide context and do not diagnose a condition.

Can reflect average blood glucose over the past 2–3 weeks (shorter window than A1c).

Why it matters
May be an option in pregnancy, when faster red cell turnover can make A1c falsely low; a clinician can decide whether it's useful in gestational diabetes.

Higher levels
High fructosamine may mean your average blood sugar over the past 2 to 3 weeks has been high. It can help when A1c is harder to trust, such as with iron deficiency from heavy periods or during pregnancy, and it can show changes within weeks. Diabetes and gestational diabetes can raise it. Very high blood protein levels can also push it up, so your albumin can help put it in context. You may notice thirst, frequent urination or tiredness, and some people may feel nothing.

Lower levels
Low fructosamine may mean your blood sugar has stayed well controlled, or it can mean low blood protein has pulled the result down falsely. Low albumin, the main protein in blood, can come with liver disease, kidney protein loss, malnutrition or pregnancy. An overactive thyroid (hyperthyroidism) can also lower it, because proteins may turn over faster. A low value by itself may cause no symptoms, so a clinician may compare it with your albumin and A1c before reading much into it.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Fructosamine →

These notes provide context and do not diagnose a condition.

Hormone that raises blood sugar; opposes insulin and helps evaluate rare pancreatic tumors.

Why it matters
Used in workup of unexplained hyperglycemia and necrolytic migratory erythema in women with rare glucagonomas.

Higher levels
High glucagon may point to a rare hormone-making growth in the pancreas (glucagonoma), prolonged fasting, severe stress or type 2 diabetes with insulin resistance. This rare growth can cause high blood sugar, weight loss and a red, blistering rash (necrolytic migratory erythema). Kidney and liver disease can also raise it. Recent fasting can sway the result, so a clinician may ask when you last ate. This specialized test may come up when blood sugar looks unusual, even though glucose and A1c can be the main checks for diabetes with PCOS or after pregnancy.

Lower levels
Low glucagon may be uncommon, and it can occur with chronic pancreatitis, after surgery on the pancreas or with rare congenital deficiencies. Because glucagon can lift blood sugar back up during a low, a shortage may make low blood sugar harder to recover from. You may notice shakiness, sweating or confusion during a low. Long-standing type 1 diabetes can also blunt this response. A clinician may order this test when looking into repeated low blood sugar, rather than as a routine check.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Glucagon →

These notes provide context and do not diagnose a condition.

Pituitary hormone affecting growth and metabolism; can be abnormal in acromegaly and GH deficiency.

Why it matters
GH deficiency in adult women can contribute to fatigue, central adiposity, and bone loss; acromegaly can disrupt cycles and fertility.

Higher levels
High growth hormone (GH) may point to acromegaly in adults, gigantism in children or a pituitary tumor. Short spikes can happen with stress and exercise, and levels can rise and fall through the day, so a single result can be hard to read. Too much GH over time can cause irregular or missed periods, larger hands and feet, headaches or joint pain. Oral estrogen can also nudge it up. A clinician may pair this result with IGF-1 or a timed suppression test.

Lower levels
Low growth hormone (GH) may point to growth hormone deficiency, a pituitary gland that isn't working well (pituitary failure) or normal aging. Because GH comes in bursts, a low single value can be normal, so a clinician may use IGF-1 or a stimulation test. In adult women, a true deficiency can bring tiredness, more belly fat and weaker bones. Heavy blood loss during childbirth can rarely damage the pituitary (Sheehan syndrome), and pituitary tumors or surgery can also lower it.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Growth hormone →

These notes provide context and do not diagnose a condition.

A1c with automatic 1,5-AG follow-up when A1c is borderline; captures glucose excursions A1c misses.

Why it matters
Can be particularly useful in women with PCOS or post-gestational diabetes whose A1c looks normal despite post-meal spikes.

Higher levels
High A1c on this test may mean your blood sugar has run high over the past 3 months, which may point to poor long-term control. If A1c lands in a certain range, the lab can automatically add 1,5-AG, which can show sugar spikes from recent weeks that an average may hide. With PCOS or after diabetes in pregnancy, these spikes can happen even when the average looks fine. Pregnancy can make both parts harder to read, and a fasting glucose can add context.

Lower levels
Low A1c on this test may mean steady blood sugar, or it may be falsely low if red blood cells aren't living as long as they should, as can happen with hemolysis or recent bleeding. The lab may not add 1,5-AG when A1c falls outside its set range, so after-meal spikes can go unmeasured. With a history of PCOS or diabetes in pregnancy, a clinician may ask about symptoms or order other sugar tests even when this number looks reassuring.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about HbA1c with reflex to 1,5-AG →

These notes provide context and do not diagnose a condition.

Hormone made by fat cells signaling satiety; can be elevated in obesity and decreased in malnutrition.

Why it matters
Low leptin can cause hypothalamic amenorrhea in athletes and women with eating disorders, disrupting cycles and fertility.

Higher levels
High leptin may go along with obesity, because fat cells can make more of it as body fat grows. The brain can then stop responding well to leptin's message to curb appetite, which is called leptin resistance. Levels can also run higher in women than in men, partly because women can carry more body fat, and they can rise in pregnancy, when the placenta can make leptin too. High leptin can also go along with insulin resistance and metabolic syndrome. A high level may not cause symptoms by itself, and it can shift with recent weight change.

Lower levels
Low leptin may point to low body fat, severe calorie restriction or, rarely, a leptin deficiency present from birth (congenital leptin deficiency). In women, very low levels can go along with hypothalamic amenorrhea, when periods stop because the brain senses too little stored energy, as can happen with eating disorders or very hard training. Some people may notice missed periods, trouble getting pregnant or feeling cold, and others may have no symptoms. Recent fasting or quick weight loss can push leptin down, so one result may need to be read with your eating and exercise habits in mind.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Leptin →

These notes provide context and do not diagnose a condition.

Autoantibody in type 1 diabetes; helps distinguish T1D from T2D and LADA.

Why it matters
Useful in women with new-onset diabetes during/after pregnancy when classifying diabetes type.

Higher levels
A positive or high ZnT8 antibody result may point to autoimmune (type 1) diabetes, where the immune system attacks the insulin-making beta cells in the pancreas. The antibody can be highly specific for this process, so it can help tell autoimmune diabetes, including LADA, a slow-starting form in adults, from type 2. It may also appear before blood sugar rises. Diabetes that first appears during or after pregnancy can now and then turn out to be type 1, and this test may help sort that out. Thirst, frequent urination or weight loss you didn't plan can appear, or there may be no symptoms yet.

Lower levels
A low or negative ZnT8 antibody result may point away from type 1 diabetes, but it can't rule it out on its own. Some people with type 1 diabetes may test negative for ZnT8 and still have other autoantibodies, such as GAD65, IA-2 or insulin antibodies, so a clinician may check those too. These antibodies can also fade in the years after diabetes starts, which can make timing matter. For diabetes that begins in pregnancy, a negative result may fit gestational diabetes, though a clinician may look at your other tests before deciding which kind it is.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about ZnT8 antibody →

These notes provide context and do not diagnose a condition.

Hormone that lowers blood sugar; elevated levels may point to insulin resistance.

Why it matters
Foundational test in PCOS, perimenopause, and weight-loss workups — insulin resistance is central to many women's metabolic issues.

Higher levels
High fasting insulin may point to insulin resistance, when your pancreas works harder to keep blood sugar (glucose) normal until it can't keep up. It can happen with prediabetes, metabolic syndrome, extra weight around the middle or too little physical activity, and many women with PCOS may have it too. Insulin resistance can also become more of a concern in perimenopause and after menopause. A recent meal or steroid medicines can raise insulin, so fasting can matter for this test. Some people may notice dark, velvety skin patches (acanthosis nigricans), and others may have no symptoms.

Lower levels
Low fasting insulin can be normal in lean, metabolically healthy people. Very low insulin with high blood sugar (glucose) may point to type 1 diabetes or advanced type 2 diabetes, when the pancreas can't make enough. Long fasting can lower it, and so can damage to the pancreas. With high blood sugar, some people may notice thirst, frequent urination or weight loss they didn't plan. A clinician may look at glucose, A1C or C-peptide to help make sense of a low result.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Insulin →

These notes provide context and do not diagnose a condition.

Liver enzyme; elevations may point to liver cell injury from fatty liver disease, hepatitis, medications, or alcohol.

Higher levels
High ALT may point to liver cell injury, and it can come from fatty liver disease, alcohol, viral hepatitis or medicines that can be hard on the liver. Fatty liver can be more common with PCOS, insulin resistance and after menopause. Healthy ALT can run lower in women than in men, so even a borderline result may be worth a closer look. Heavy exercise can raise ALT for a short time too. Tiredness or pain in the upper right belly can happen, but many people may feel fine.

Lower levels
Low ALT may be harmless, and it can occasionally reflect low vitamin B6 or low muscle mass. Healthy levels can run lower in women than in men, so a result near the bottom of the range may mean little. A low value can't rule out liver trouble, because ALT can look normal even when fatty liver is present. People on long-term kidney dialysis can also have low readings. A low result may cause no symptoms by itself, and a clinician can read it with your other liver tests.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about ALT →

These notes provide context and do not diagnose a condition.

Liver and muscle enzyme; with ALT, evaluates liver injury patterns.

Higher levels
High AST may come from the liver, but it can be less liver-specific than ALT. Significant rises can happen with muscle injury, red blood cell breakdown (hemolysis) or heart events, as well as hepatitis, so a hard workout or a difficult blood draw can sway it. Comparing it with ALT can help a clinician tell where the rise may come from. In late pregnancy, rising liver enzymes can be one sign of HELLP syndrome, a rare complication that may come with high blood pressure. Sore muscles, tiredness or belly pain can come with a high result, while others may feel fine.

Lower levels
Low AST may be harmless and not clinically meaningful. Healthy people can have small amounts in their blood, because this enzyme can stay inside liver, heart and muscle cells until they're hurt. Low vitamin B6 or long-term kidney dialysis can sometimes push readings down. A low value may not cause any symptoms, and it can't rule out liver trouble on its own, so a clinician may read it beside your ALT and other liver tests.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about AST →

These notes provide context and do not diagnose a condition.

Liver enzyme sensitive to alcohol use and bile-duct obstruction; can rise in fatty liver disease.

Why it matters
Can be helpful in evaluating elevated alkaline phosphatase (distinguishes liver vs. bone origin) and screens for liver disease in women.

Higher levels
High GGT may point to bile duct injury, fatty liver, alcohol use or medicines that can stress the liver. It can rise early with regular drinking, and women can develop alcohol-related liver damage after less drinking than men. GGT can also help show whether a high alkaline phosphatase comes from the liver or from bone, since a high GGT may point to the liver. Many people may have no symptoms, and some seizure medicines can raise it without any liver damage. ALT and AST results can help narrow down what is going on.

Lower levels
Low GGT can be a normal finding. Next to a high alkaline phosphatase, a low or normal GGT may point to bone rather than the liver, and pregnancy can be another reason for that pattern. Birth control pills can nudge GGT down, and it can run lower in pregnancy. A low value can't rule out every liver problem, because some liver conditions may not raise it, so a clinician may still read it with your other liver results.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about GGT →

These notes provide context and do not diagnose a condition.

Main protein in blood; can reflect liver synthesis, nutritional status, and inflammation.

Higher levels
High albumin (hyperalbuminemia) may reflect dehydration, when your blood can become more concentrated than normal. Vomiting, diarrhea, heavy sweating or not drinking enough can push it up, and a mildly elevated value may come back into range once you rehydrate. A tourniquet left on for a while during a blood draw can raise it a little too. True hyperalbuminemia can be clinically rare and may not be a concern on its own. Thirst, dark urine or dizziness can come from the fluid loss.

Lower levels
Low albumin (hypoalbuminemia) can be a sign of liver disease, malnutrition, chronic kidney disease or significant inflammation. It can also affect how hormones and medicines travel through your body, and it can change how your calcium result looks. Albumin can drift lower in a normal pregnancy as blood volume grows, and a sharper fall may go along with poor nutrition or preeclampsia. Lupus that harms the kidneys can let albumin leak into urine, which can lower your level too. Swelling in the legs, ankles or belly can appear, though a mild drop may cause no symptoms.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Albumin →

These notes provide context and do not diagnose a condition.

Enzyme from liver, bone, and placenta; elevations may point to bone turnover, liver disease, or pregnancy.

Higher levels
High alkaline phosphatase (ALP) may point to the liver or bile ducts, especially alongside a high GGT, or to faster bone turnover, such as a healing fracture, vitamin D deficiency or bone disease. It can normally rise in pregnancy because the placenta can make it too, and it can also creep up after menopause as bone turnover picks up. Primary biliary cholangitis, a slow-moving liver condition that mostly affects women in midlife, can raise it as well. Itching, bone pain or yellow skin can appear, or there may be no symptoms at all.

Lower levels
Low alkaline phosphatase (ALP) can be uncommon and may not be a concern. It can reflect low zinc or magnesium, malnutrition, low thyroid function (hypothyroidism) or, rarely, the inherited condition hypophosphatasia, which can weaken bones and teeth. Estrogen medicines, including some birth control pills, can nudge ALP lower too. A slightly low result may cause no symptoms, though bone pain or early tooth loss can lead a clinician to look for the inherited condition.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Alkaline phosphatase →

These notes provide context and do not diagnose a condition.

Total breakdown product of red blood cells; high levels can cause jaundice.

Higher levels
High bilirubin can reflect liver disease, a blocked bile duct or faster breakdown of red blood cells. A mild rise on its own may come from Gilbert syndrome, a harmless inherited trait that can show up more when you're fasting, ill or on your period. Gallstones can be more common in women, and a stone that blocks a bile duct can raise bilirubin too. Very high levels can cause jaundice, a yellowing of the skin and eyes, and some people may notice dark urine or itching.

Lower levels
Low bilirubin may not be considered clinically significant. Bilirubin comes from the breakdown of old red blood cells, and a level near the bottom of the range can be harmless. Caffeine and some medicines can lower the reading a little. A low result may not cause any symptoms, and it can't rule out a liver or bile duct problem, so a clinician may read it with your other liver tests.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Total bilirubin →

These notes provide context and do not diagnose a condition.

Total protein in blood; can reflect nutrition, liver synthesis, and inflammation.

Higher levels
High total protein may point to dehydration, chronic inflammation, or a monoclonal gammopathy, when one type of antibody builds up, as in multiple myeloma. Autoimmune conditions such as lupus or Sjögren’s, which mostly affect women, can push antibodies and total protein up. Long-term infections can do the same. Thirst and dark urine can go with dehydration, while tiredness or bone pain may point elsewhere, and some people may feel well. A clinician may compare albumin with globulins and may look at a serum protein electrophoresis test.

Lower levels
Low total protein may occur with malnutrition, malabsorption, liver disease, protein loss through the kidneys, or burns. A larger blood volume in pregnancy can lower it a little, which can be normal. Getting a lot of IV fluid before a blood draw can also dilute your blood. Swelling in your legs or belly and tiredness can appear, though a small dip may cause no symptoms. Albumin, liver tests and a urine protein check may help a clinician find where the protein is going.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Total protein →

These notes provide context and do not diagnose a condition.

Protein that protects lungs and liver from enzyme damage; deficiency can cause early lung and liver disease.

Why it matters
Hormonal changes in pregnancy can alter A1AT levels.

Higher levels
High alpha-1-antitrypsin (AAT) may mean your body is responding to inflammation or infection, since this protein can rise as part of the acute-phase response. Pregnancy and hormonal birth control with estrogen can also raise it. A high level may cause no symptoms on its own, and any symptoms may come from whatever set it off. A rise can also hide a mild shortage, so a clinician may retest after an illness or order a genetic test when there is a family history.

Lower levels
Low alpha-1-antitrypsin (AAT) may point to alpha-1-antitrypsin deficiency, an inherited condition and a genetic risk factor for early emphysema and liver disease. Breathing symptoms such as wheezing or shortness of breath can look like asthma, so this condition can go unnoticed for years. Smoking can speed up lung damage, and severe liver disease can also lower AAT, since the liver makes it. Because the inherited form runs in families, a low result can matter for relatives and future children, and a clinician may order genetic testing to learn more.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Alpha-1 antitrypsin →

These notes provide context and do not diagnose a condition.

Toxic nitrogen byproduct cleared by the liver; elevations can cause confusion and may point to severe liver dysfunction.

Why it matters
Important in evaluating altered mental status in pregnancy (acute fatty liver, HELLP) and urea cycle disorder carriers.

Higher levels
High ammonia may mean your liver can't turn it into urea fast enough, so it builds up in your blood. It can happen with cirrhosis, confusion from liver disease (hepatic encephalopathy) or rare urea cycle disorders. High levels can cause confusion, unusual sleepiness or changes in behavior. In pregnancy, a clinician may check it with sudden confusion, since acute fatty liver of pregnancy and HELLP syndrome can affect the liver. Sample handling can sway this result, because ammonia can rise if blood sits too long before testing.

Lower levels
Low ammonia may not be clinically meaningful, and it can simply be a normal finding. A healthy liver can turn ammonia into urea quickly, so little may be left in your blood. This isn't a routine screening test, so a clinician may use it only when following up on liver concerns, confusion or a rare inherited condition. A low value can't speak to your overall liver health, which a clinician may check with ALT, AST and bilirubin.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Ammonia →

These notes provide context and do not diagnose a condition.

The conjugated (water-soluble) form of bilirubin; elevations may suggest bile-duct obstruction or hepatocellular disease.

Why it matters
Cholestasis of pregnancy can raise direct bilirubin and carries fetal risk — making this an important obstetric flag.

Higher levels
High direct bilirubin may mean bile isn't draining normally from your liver, which can happen with a blocked bile duct, slowed bile flow (cholestasis) or liver cell injury. Gallstones can be more common in women, especially during pregnancy or with estrogen birth control or hormone therapy. Cholestasis of pregnancy can raise it too and can cause intense itching late in pregnancy, though a clinician may rely on a bile acid test. You may notice yellow skin or eyes (jaundice), dark urine or pale stools.

Lower levels
Low direct bilirubin may be normal, and it may have no clinical meaning on its own. Most bilirubin in healthy blood can be the unprocessed kind, so a low or undetectable direct result can be expected. It may simply mean your liver is moving bile along as it should. It can't rule out gallstones or liver problems alone, and a clinician may still check bile acids for intense itching late in pregnancy.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Direct bilirubin →

These notes provide context and do not diagnose a condition.

Copper-carrying protein; low levels may suggest Wilson's disease, high levels can reflect inflammation or estrogen state.

Why it matters
Estrogen can raise ceruloplasmin — values can change in pregnancy and on oral contraceptives, which must be considered in interpretation.

Higher levels
High ceruloplasmin can happen with inflammation, pregnancy, oral estrogen or certain liver conditions, since this copper-carrying protein can rise when your body responds to illness or injury. Estrogen birth control and hormone therapy can raise it, so levels can run higher in pregnancy and on these medicines. That rise can make a truly low level look normal when a clinician is checking for Wilson disease, an inherited copper condition. You may feel nothing from the high value itself, and inflammation and liver tests can help find the reason.

Lower levels
Low ceruloplasmin may point to Wilson disease (Wilson's disease), an inherited condition where copper builds up in the liver, brain and eyes, or to a severe copper shortage (copper deficiency), which can follow weight-loss surgery. Wilson disease can cause liver problems, tremors or mood changes, while a copper shortage can cause anemia, numbness or trouble walking. Heavy protein loss can also lower it. A clinician may check copper in your blood and urine, because this result can't settle the question alone.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Ceruloplasmin →

These notes provide context and do not diagnose a condition.

Enzyme released from damaged cells in many tissues; can be elevated in hemolysis, tissue injury, and some cancers.

Why it matters
Marker of hemolysis in HELLP syndrome — a pregnancy emergency — and tumor burden in some gynecologic cancers.

Higher levels
High LD (lactate dehydrogenase, also called LDH) may mean cells somewhere in your body have been damaged, since this enzyme can spill from many tissues. It can happen with the breakdown of red blood cells (hemolysis), liver disease, cancer, heart events or muscle injury. In pregnancy, it can be one of the checks for HELLP syndrome, a pregnancy emergency, and some gynecologic cancers can raise it. Hard exercise can raise it for a short time, and damaged red cells in the sample can too. On its own, it can't tell where a problem is.

Lower levels
Low LD can be harmless, and many people may need no follow-up. LD is a broad marker found in almost every tissue, so a low value can't rule out a specific illness or tell you much about any one organ. Rarely, an inherited shortage of this enzyme can explain a very low value. A clinician may look further only if a low result turns up alongside unusual muscle symptoms or other odd lab findings.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Lactate dehydrogenase (LD) →

These notes provide context and do not diagnose a condition.

Short-half-life protein; can reflect recent nutritional status better than albumin.

Why it matters
Used in nutritional assessment for women with hyperemesis, eating disorders, or post-bariatric surgery.

Higher levels
High prealbumin may be uncommon, but it can happen with Hodgkin lymphoma (Hodgkin's lymphoma) or steroid use. Reduced kidney function can also raise it, since the kidneys help clear this protein. Dehydration can make it read higher as well. You may notice no symptoms from a high value, though a clinician may look at your kidney results and medicines. It can't tell you whether your nutrition is good, so it may be read with your overall health and other results.

Lower levels
Low prealbumin may point to recent protein-calorie malnutrition or inflammation, and it can drop within days of poor intake. It can help track nutrition when eating is hard, such as with morning sickness that won't let up, during recovery from an eating disorder or after weight-loss surgery. Illness, infection, inflammation and liver disease can lower it even when you eat well, so a CRP test and your weight history can help a clinician judge it. You may notice tiredness, weight loss or muscle loss if intake has been low.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Prealbumin →

These notes provide context and do not diagnose a condition.

Kidney function marker influenced by hydration and protein intake.

Why it matters
Useful in pregnancy (where normal values can be lower due to volume expansion) and in evaluating hyperemesis.

Higher levels
High BUN (blood urea nitrogen) may point to dehydration, a high-protein diet, bleeding in the digestive tract (GI bleeding) or reduced kidney function. It can also rise when your body is breaking down a lot of its own tissue (a catabolic state), as can happen with severe illness. Dehydration from vomiting, including morning sickness that won't let up, can push it up. Steroid medicines can nudge it higher as well. Creatinine, another kidney waste product, can give a clearer picture when checked alongside it.

Lower levels
Low BUN can reflect liver problems, low protein intake, malnutrition or drinking a lot of fluid (overhydration). In pregnancy, your kidneys can filter more blood, so BUN can run lower than before and what counts as normal can shift. Eating very little, as with an eating disorder, can also bring it down. On its own, a low value can be harmless. If it comes with low albumin or abnormal liver enzymes, a clinician may look more closely at your liver or nutrition.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about BUN (urea nitrogen) →

These notes provide context and do not diagnose a condition.

Essential mineral for bones, nerves, and muscles; tightly regulated by parathyroid hormone and vitamin D.

Higher levels
High calcium (hypercalcemia) can be caused by primary hyperparathyroidism, when a parathyroid gland in the neck is overactive, or by cancer (malignancy). Primary hyperparathyroidism can be most common in women after menopause. Too much vitamin D or calcium, some water pills, lithium and dehydration can raise it too. Some people may notice fatigue, nausea, constipation, strong thirst or kidney stones, and others may have no symptoms. A clinician may order PTH and vitamin D tests to help find the reason.

Lower levels
Low calcium (hypocalcemia) can result from low vitamin D, hypoparathyroidism (underactive parathyroid glands) or kidney disease. Low albumin can make total calcium look low even when the active form is normal, so a clinician may check albumin or ionized calcium too. That can happen in pregnancy, when albumin can drift lower. Low magnesium and thyroid or neck surgery can also play a part. Muscle cramps or tingling in the fingers and toes can happen, and severe low calcium can cause tetany, which is painful muscle spasms.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Calcium →

These notes provide context and do not diagnose a condition.

Mostly bicarbonate, the blood's main buffer; part of the metabolic panel used to assess acid-base balance.

Higher levels
High CO2 (bicarbonate) may suggest metabolic alkalosis, when the blood can become less acidic than normal, or it may be the body making up for a breathing problem. Repeated vomiting, including severe nausea in pregnancy, can push it up, and so can water pills (diuretics). Long-term lung conditions can raise it too, because the kidneys may hold on to bicarbonate. Muscle cramps, twitching or weakness can happen, or there may be no symptoms. A clinician may read it with your sodium, potassium and chloride.

Lower levels
Low CO2 (bicarbonate) may suggest metabolic acidosis, when acid can build up in the blood, or the body making up for fast breathing. It can be seen with kidney disease, severe diarrhea or uncontrolled diabetes. In pregnancy you can naturally breathe more deeply, so a slightly lower level may be expected. A blood tube that isn't filled all the way can also lower the reading a little. Fast breathing, tiredness or nausea can appear, depending on what's behind it.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Carbon dioxide (CO2) →

These notes provide context and do not diagnose a condition.

Major electrolyte; evaluates acid-base balance and hydration with sodium and bicarbonate.

Higher levels
High chloride (hyperchloremia) can come with dehydration or with a form of metabolic acidosis, for example after long-lasting diarrhea or with certain kidney conditions. Chloride can move up and down with sodium, so the two may be read together, along with potassium and bicarbonate. Salt-based IV fluids can raise it for a short time. Many people may have no symptoms from the number itself, though thirst or tiredness can come with fluid loss.

Lower levels
Low chloride (hypochloremia) can follow long bouts of vomiting, water pill (diuretic) use or fluid overload, and it can move together with low sodium. Morning sickness that won't let up can lower chloride along with other electrolytes, so it may matter in pregnancy. Heart failure can also make the body hold extra fluid, which can dilute chloride. Weakness, muscle cramps or confusion can appear when levels fall further, and mild cases may cause no symptoms. A clinician may look at your sodium, potassium and fluid balance to sort out the reason.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Chloride →

These notes provide context and do not diagnose a condition.

A muscle waste product cleared by the kidneys; the core marker used to estimate kidney filtration (eGFR).

Higher levels
High creatinine may point to reduced kidney filtration, and it can also rise with dehydration or high muscle mass. Hard exercise, creatine supplements, a big meal of cooked meat and some medicines can nudge it up too. In pregnancy, creatinine can naturally drop, so a level that looks normal for others may deserve a closer look. Swelling, tiredness or changes in urination can appear, or there may be no symptoms until kidney function is quite low. A clinician may use this result to estimate your eGFR.

Lower levels
Low creatinine may be harmless, and it can reflect low muscle mass, pregnancy or overhydration. Women can have less muscle than men, so labs may use a separate range for women. Weight loss, aging and muscle-wasting conditions can lower it too. A low level may not cause symptoms by itself. It can make kidney estimates look better than they are, though, so a clinician may add a cystatin C test if muscle mass is very low.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Creatinine →

These notes provide context and do not diagnose a condition.

Estimated glomerular filtration rate from creatinine, the standard measure of how well your kidneys filter blood.

Higher levels
A higher eGFR may mean better kidney filtration, and a value in the normal range may point to healthy kidney function. Low muscle mass can lower creatinine and lift this estimate, so it may overstate how well the kidneys work in some women. The formula isn't designed for pregnancy, when your kidneys can naturally filter much more. A normal eGFR can't rule out early kidney disease on its own, so a clinician may add a urine albumin test, especially with diabetes or high blood pressure.

Lower levels
A low eGFR may point to reduced kidney function, and values that stay low over time can define chronic kidney disease (CKD). Diabetes and high blood pressure can be major reasons, and long-term kidney disease can be slightly more common in women. Dehydration, high muscle mass and some medicines can also make this estimate read low. Many people may have no symptoms early on, while swelling or tiredness can appear later. A clinician may repeat the test before reading much into one result.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about eGFR →

These notes provide context and do not diagnose a condition.

Serum potassium — standard electrolyte assessment.

Higher levels
High potassium (hyperkalemia) may be a true result or a false one, because red cells can break open in the sample (hemolysis) and leak potassium. A genuinely high level can happen with kidney failure, cell breakdown or certain medicines, including some taken for acne or unwanted hair growth tied to PCOS. A tight fist during the blood draw or a delay in processing the sample can also raise it. Muscle weakness, nausea or a fluttering heartbeat may appear, or there may be no symptoms. Because potassium can affect heart rhythm, a very high level may need prompt care, and a clinician may want a repeat test soon.

Lower levels
Low potassium (hypokalemia) may mean your body is losing more than it’s taking in. It can occur with diuretics (water pills), losses from vomiting, diarrhea or frequent laxative use, high aldosterone (hyperaldosteronism) or refeeding syndrome, which can occur when eating restarts after a long stretch of very little food. Long bouts of morning sickness can lower it too. Muscle cramps, weakness, constipation or skipped heartbeats may appear, and mild cases may cause none of these. A clinician may also look at magnesium, since low magnesium can make potassium harder to correct.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Potassium →

These notes provide context and do not diagnose a condition.

Major electrolyte; evaluates hydration and brain/kidney homeostasis.

Higher levels
High sodium (hypernatremia) may mean there’s too little water for the salt in your blood, as can happen with dehydration, low fluid intake or heavy sweating. Vomiting, diarrhea or a fever can add to fluid loss, and morning sickness that won’t let up can throw sodium and other salts out of balance. A rare hormone problem called diabetes insipidus can also make the body lose too much water. Thirst, a dry mouth, restlessness or confusion can set in. Older adults can feel less thirsty, so a high level may go unnoticed for a while.

Lower levels
Low sodium (hyponatremia) may follow drinking large amounts of water, such as during long workouts or races, or taking diuretics or some antidepressants, and that risk can grow with age. Heart, liver, kidney or hormonal conditions can also lower it. Morning sickness that won’t let up can throw salts out of balance too. Larger drops can cause headache, nausea or confusion, while a small dip may go unnoticed. Very high blood sugar can also pull water into the blood and lower sodium.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Sodium →

These notes provide context and do not diagnose a condition.

The biologically active form of calcium, independent of albumin levels.

Why it matters
More accurate calcium status in pregnancy and critical illness when albumin shifts; important for parathyroid disease workup.

Higher levels
High ionized calcium may point to an overactive parathyroid gland (hyperparathyroidism), cancer (malignancy), too much vitamin D (vitamin D toxicity) or taking in too much calcium or calcium antacids. Parathyroid problems can be more common in women after menopause. This test measures only the free, active calcium, so it can help when a total calcium result is unclear. You may notice thirst, constipation, tiredness or kidney stones, or nothing at all. Parathyroid hormone (PTH) and vitamin D results can help find the reason.

Lower levels
Low ionized calcium may mean less of the free, active calcium is reaching your nerves, muscles and heart. It can happen with an underactive parathyroid gland (hypoparathyroidism), low vitamin D, severe low magnesium or critical illness. Symptoms can include tingling, muscle cramps or spasms. In pregnancy, a natural drop in blood protein can make total calcium look low, and this test can help show whether the active form is fine. How the sample is handled can also sway the result, so a clinician may repeat an unexpected value.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Ionized calcium →

These notes provide context and do not diagnose a condition.

Indicator of tissue hypoxia, sepsis, or metabolic stress.

Why it matters
Can rise in sepsis (including in postpartum infections) and DKA in pregnancy; critical-care marker.

Higher levels
High lactic acid (lactate) may mean your tissues aren't getting enough blood flow or oxygen (hypoperfusion). It can happen with a serious body-wide infection (sepsis), including an infection after childbirth, or with diabetic ketoacidosis in pregnancy. Problems with how cells make energy (mitochondrial dysfunction) and, rarely, metformin-related acidosis can raise it too. You may notice fast breathing, nausea or muscle weakness, and a very high level with serious illness can be an emergency. Hard exercise shortly before the draw can raise it for a short time, so a rested sample can be easier to read.

Lower levels
Low lactic acid may be a normal finding with no clinical meaning. Your body can make and clear this substance all day, so a low value may simply mean your cells had enough oxygen and weren't working hard when the sample was drawn. Resting before the test can keep it low. A low result can't explain unusual muscle weakness or tiredness, so a clinician may still look into those symptoms with other tests.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Lactic acid →

These notes provide context and do not diagnose a condition.

Measures blood concentration; evaluates hydration, sodium disorders, and pituitary function.

Why it matters
Important in evaluating hyperemesis gravidarum, SIADH, and diabetes insipidus — all relevant in pregnancy.

Higher levels
High serum osmolality may mean your blood is too concentrated. It can happen with dehydration, uncontrolled diabetes or swallowing a toxin such as methanol, ethylene glycol or ethanol (alcohol). Morning sickness that won't let up (hyperemesis gravidarum) can leave you dehydrated and push this result up, and a rare form of diabetes insipidus can appear in pregnancy. You may notice thirst, a dry mouth, less urine or confusion. Your sodium, blood sugar and kidney results can help narrow down the reason.

Lower levels
Low serum osmolality may mean there is too much water for the salt and other particles in your blood. It can happen with water overload, drinking very large amounts of fluid (polydipsia), eating very little (low solute intake) or SIADH, when your body holds on to too much water. Water pills and certain antidepressants can lower sodium and pull this result down. It can also run slightly lower in pregnancy. Headache, nausea or confusion can appear if it drops quickly, and a clinician may check your sodium and urine results to find the reason.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Serum osmolality →

These notes provide context and do not diagnose a condition.

Mineral important for bone, energy (ATP), and cell membranes.

Why it matters
Alterations in phosphate can accompany bone disease, kidney disease, and refeeding syndrome (eating-disorder recovery).

Higher levels
High phosphate (hyperphosphatemia) may point to reduced kidney function, an underactive parathyroid gland (hypoparathyroidism), too much vitamin D (vitamin D toxicity) or muscle breakdown (rhabdomyolysis). Phosphate-based laxatives or bowel preps can raise it for a time. A delayed or damaged sample can also read falsely high. You may feel nothing from the phosphate itself, though some people may notice cramps or tingling if calcium drops at the same time. Your calcium, parathyroid hormone and kidney results can help explain the number.

Lower levels
Low phosphate (hypophosphatemia) can happen with refeeding syndrome, when eating picks back up after a long stretch of very little food, as in recovery from an eating disorder. Heavy alcohol use, low vitamin D, phosphate-binding antacids and an overactive parathyroid gland (hyperparathyroidism), which can be more common in women after menopause, can also lower it. Some people may notice weakness, bone pain or confusion when levels fall very low. A recent sugary or starchy meal can lower it for a short time.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Phosphate →

These notes provide context and do not diagnose a condition.

Purine metabolism end-product; high levels can cause gout and kidney stones.

Why it matters
Elevated uric acid in pregnancy may be a preeclampsia marker; also linked to PCOS and metabolic syndrome in women.

Higher levels
High uric acid (hyperuricemia) may point to gout, a diet high in purines such as red meat and alcohol, reduced kidney function or metabolic syndrome. It can also raise the chance of kidney stones, and water pills or dehydration can push it up. Levels can rise after menopause, when estrogen may no longer help your kidneys clear it as well, and they may be linked to PCOS. In pregnancy, a high level may be a marker of preeclampsia. Some people may feel sudden, severe joint pain, and others may have no symptoms.

Lower levels
Low uric acid (hypouricemia) may not be a concern on its own. Very low values can happen with certain medicines, including some used to treat gout, or with rare genetic conditions. Levels can run lower early in pregnancy, when your kidneys filter more blood. Some kidney tubule conditions can also let too much uric acid escape in urine. A low value may cause no symptoms, so a clinician may follow up only if other results look unusual.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Uric acid →

These notes provide context and do not diagnose a condition.

Pancreatic enzyme that can rise with pancreatitis.

Why it matters
Pregnancy can increase pancreatitis risk (it can be due to gallstones); useful in evaluating severe abdominal pain in pregnant women.

Higher levels
High amylase may point to acute pancreatitis, inflamed salivary glands (as with mumps) or a bowel blockage (obstruction). Gallstones can be a major trigger for pancreatitis, and they can be more common in women, especially with pregnancy or estrogen medicines. Alcohol, kidney problems and a tubal (ectopic) pregnancy can also raise amylase. Pancreatitis can bring sudden upper belly pain that may spread to the back, along with nausea or vomiting. Because amylase can come from more than one organ, a clinician may check lipase too.

Lower levels
Low amylase can reflect long-term pancreas damage, severe liver disease or cystic fibrosis. The pancreas damage can follow years of chronic pancreatitis, when the organ can't make enough enzymes. Some people may then notice greasy stools, bloating or weight loss they didn't plan. A slightly low result with no other findings may mean little. Salivary glands can make amylase too, so this test can't speak for the pancreas alone, and a clinician may add lipase, or a stool test to look at pancreas function.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Amylase →

These notes provide context and do not diagnose a condition.

Pancreatic enzyme more specific than amylase for pancreatitis.

Why it matters
Can help check for pancreatitis in pregnancy — more common due to gallstones and hypertriglyceridemia during pregnancy.

Higher levels
High lipase can be one of the most specific blood clues to pancreatic injury, such as acute pancreatitis, a blocked pancreatic duct or pancreatic trauma. Gallstones can be a leading reason for pancreatitis, and they can be more common in women, especially with pregnancy or estrogen medicines. In pregnancy, high triglycerides can play a part too. Kidney disease and alcohol can also raise lipase. With pancreatitis, you may feel severe upper belly pain reaching the back, with nausea or vomiting.

Lower levels
Low lipase can reflect long-term pancreas damage or cystic fibrosis, though it's rarely something a clinician can act on alone. Without symptoms, a low result may mean little. If the pancreas can't make enough digestive enzymes, some people may notice oily stools, bloating or weight loss they didn't plan. A clinician may ask about these before reading much into the number, and a stool test can look at pancreas function more directly.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Lipase →

These notes provide context and do not diagnose a condition.

Primary estrogen during reproductive years; produced by ovaries.

Why it matters
Core marker for ovulation, cycle phase, fertility, perimenopause, and HRT monitoring — foundational to women's health.

Higher levels
High estradiol may be normal around ovulation, when levels can peak late in the follicular phase. Outside that window, it can point to estrogen excess, an ovarian tumor, or estrogen-containing supplements or hormone therapy. Levels can also climb in pregnancy and during fertility treatment, and they can swing widely in perimenopause. Breast tenderness, bloating or heavy or irregular periods can occur, or a high level may pass unnoticed. Cycle day can sway the result, and biotin can interfere with some estradiol tests.

Lower levels
Low estradiol may be normal after menopause, and it can also run low early in your cycle. Before menopause, it may suggest ovarian insufficiency or hypothalamic amenorrhea, when stress, under-eating or hard training can stop periods. Breastfeeding and hormonal birth control can lower your own estradiol too. Hot flashes, night sweats, vaginal dryness, missed periods or trouble sleeping can appear. Long-lasting low estrogen can affect bone health, so a clinician may look at FSH and your cycle history.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Estradiol →

These notes provide context and do not diagnose a condition.

May point to ovulation and supports luteal phase; can rise in second half of cycle and pregnancy.

Why it matters
Core fertility marker — can point to ovulation, monitors luteal-phase support in IVF, and tracks early pregnancy health.

Higher levels
High progesterone in the second half of your cycle (the luteal phase) may mean you ovulated. It can also point to pregnancy, when the level can keep climbing. Outside those settings, it may suggest ovarian or adrenal hyperplasia, such as congenital adrenal hyperplasia, or it can come from progesterone medicine used during fertility treatment. Breast tenderness, bloating or mood changes may appear in the days before a period. The day you test can sway the result, so your cycle dates can help a clinician read it.

Lower levels
Low progesterone about a week before your period is due may suggest a cycle without ovulation (anovulation) or a luteal-phase defect, when the second half of the cycle may not support the uterine lining well. It can be normal in the first half of your cycle, after menopause and on hormonal birth control. In early pregnancy, a low level can be linked to a higher chance of miscarriage, and a clinician may check it with hCG. PCOS, thyroid problems, high prolactin and perimenopause can all disrupt ovulation. Irregular periods, spotting before your period or trouble getting pregnant may be what you notice.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Progesterone →

These notes provide context and do not diagnose a condition.

Pituitary hormone that drives ovarian follicle growth; can rise with ovarian decline.

Why it matters
Foundational for evaluating menopause, primary ovarian insufficiency, and infertility workups; pairs with estradiol and AMH.

Higher levels
High FSH before menopause may point to diminished ovarian reserve or primary ovarian insufficiency, when the ovaries can slow down early. In men, it may point to primary testicular failure. FSH can normally run high in perimenopause and after menopause, though in perimenopause it can swing from month to month, so one result may not settle the question. Irregular periods, hot flashes or trouble getting pregnant may come with it. Cycle day can sway the number, so a clinician may pair it with estradiol and AMH.

Lower levels
Low FSH may suggest a problem with the pituitary gland or hypothalamus, the parts of the brain that can tell the ovaries what to do. It can also happen with hormonal birth control or pregnancy. Under-eating, low body weight, hard training or high prolactin can lower it as well. You may notice missed or irregular periods or trouble getting pregnant, though on birth control you may notice nothing at all. LH, estradiol and prolactin can help a clinician find the reason.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about FSH →

These notes provide context and do not diagnose a condition.

Pituitary hormone that triggers ovulation and supports luteal phase.

Why it matters
Foundational for cycle assessment, ovulation prediction, PCOS evaluation (LH:FSH ratio can be elevated), and menopause workup.

Higher levels
High LH may be the normal mid-cycle spike that can trigger ovulation, and home ovulation tests can look for this same hormone in urine. It can also be elevated in polycystic ovary syndrome (PCOS), where it can run high compared with FSH, and in primary gonadal failure, when the ovaries or testes aren’t responding. LH can rise after menopause too. Because it can spike within hours, one result can be hard to read without your cycle day. Irregular periods, acne or hot flashes may offer clues, depending on the reason.

Lower levels
Low LH may suggest a problem with the hypothalamus or pituitary gland, the parts of the brain that can set your cycle in motion. Hormonal birth control and pregnancy can lower LH as well. Under-eating, weight loss and hard training can quiet LH and stop periods, a pattern called hypothalamic amenorrhea. Missed periods, low sex drive or trouble getting pregnant may follow. A low value early in your cycle can be normal, and one result can’t tell you whether you ovulated.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about LH →

These notes provide context and do not diagnose a condition.

Mass-spec total testosterone; accurate at low female-range levels.

Why it matters
Preferred for women because immunoassay testosterone can be unreliable in the low female range — widely used for PCOS and androgen workups.

Higher levels
High total testosterone in women may point to PCOS, congenital adrenal hyperplasia (CAH) or an androgen-secreting tumor. In men, it may point to supplementation or a rare adrenal or testicular tumor. Acne, extra facial or body hair, thinning scalp hair or irregular periods can go along with it. A very high level or quickly worsening symptoms may lead a clinician to look for a tumor. Testosterone products and DHEA supplements can raise it, and levels can run higher in the morning.

Lower levels
Low total testosterone in women can reflect adrenal insufficiency or aging, and levels can also fall after removal of the ovaries or with estrogen birth control pills. In men, it may suggest primary or secondary hypogonadism, which can come from the testes or from the pituitary. Because women’s levels can start out low, a low value may be hard to interpret, and it may not explain symptoms such as low sex drive on its own. Testing in the morning can matter, especially for men, and a clinician may add free testosterone and SHBG.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Testosterone, total →

These notes provide context and do not diagnose a condition.

Biologically active testosterone — what's actually working at tissues.

Why it matters
Can be more useful than total testosterone in women — elevated free T can explain hirsutism and acne despite 'normal' total.

Higher levels
High free testosterone in women may suggest PCOS, congenital adrenal hyperplasia (CAH) or an androgen-secreting tumor. It can be high even when total testosterone looks normal, especially when SHBG, the protein that carries it, runs low. Acne, extra facial or body hair, thinning scalp hair or irregular periods can appear, and fast-growing symptoms or a deeper voice can call for a prompt look. In men, a high level may point to supplementation or other outside androgen use. Testosterone or DHEA products can lift it in women as well.

Lower levels
Low free testosterone in women can contribute to low sex drive (libido), fatigue and reduced muscle or bone strength, though these symptoms can have many other reasons. It can happen after menopause, after removal of the ovaries, with adrenal insufficiency or with estrogen birth control pills, which can raise SHBG. In men, low free testosterone may suggest hypogonadism. Women’s levels can be naturally low, so a small number may be hard to interpret. A clinician may read it with total testosterone, SHBG and how you feel.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Testosterone, free →

These notes provide context and do not diagnose a condition.

Protein that binds sex hormones; controls how much is biologically active.

Why it matters
Low SHBG can be a key marker of insulin resistance in PCOS; estrogen and thyroid hormone can raise SHBG; foundational for evaluating androgens.

Higher levels
High SHBG can bind up more testosterone, which can lower free testosterone, the active part. It can happen with an overactive thyroid (hyperthyroidism), oral estrogen such as birth control pills, pregnancy, anorexia or liver disease. Some anti-seizure medicines can have the same effect. Because more hormone may be bound, total testosterone can look normal even when free testosterone is low. You may notice low sex drive or no symptoms at all, and a clinician may read SHBG with total and free testosterone.

Lower levels
Low SHBG may raise free testosterone, leaving more of it available to act on your body. It can happen with insulin resistance, PCOS, obesity, an underactive thyroid (hypothyroidism) or androgen use. Extra free testosterone can show up as acne, extra facial or body hair, or irregular periods. Low SHBG can also be an early clue to insulin resistance, when your body needs extra insulin to manage blood sugar. A clinician may look at fasting glucose, A1c or thyroid tests alongside it.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about SHBG →

These notes provide context and do not diagnose a condition.

Adrenal androgen precursor; can reflect adrenal androgen production and can decline with age.

Why it matters
Elevated levels may point to adrenal sources of androgen excess in women (vs. ovarian/PCOS); declines may be linked to libido, energy, and bone density.

Higher levels
High DHEA sulfate (DHEA-S) in women may point to extra androgens from the adrenal glands (adrenal androgen excess), PCOS, or, rarely, an adrenal tumor. In PCOS it can be mildly high, and congenital adrenal hyperplasia can raise it too. Too many androgens can bring acne, extra facial or body hair, thinning scalp hair or irregular periods. DHEA supplements can push the number up, and levels can run higher in younger adults than in older ones. Because it can come almost entirely from the adrenals, it may help a clinician tell whether androgens are coming from there or the ovaries.

Lower levels
Low DHEA sulfate may be normal with aging, because levels can slowly fall as you get older. An extreme drop may suggest adrenal insufficiency, when the adrenal glands aren’t making enough hormone, or a pituitary problem. Steroid medicines can also lower it. With adrenal insufficiency, you may notice tiredness, dizziness when standing or weight loss. A low result in an older adult with no symptoms may not be a concern, and a clinician may check cortisol if the adrenal glands are in question.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about DHEA-S →

These notes provide context and do not diagnose a condition.

Produced by ovarian follicles; can reflect remaining egg supply (ovarian reserve).

Why it matters
Core fertility marker — may help predict response to IVF and time to menopause, and can be elevated in PCOS.

Higher levels
High AMH (anti-Mullerian hormone) may suggest a robust ovarian reserve, or egg supply, but markedly elevated levels can be a sign of polycystic ovary syndrome (PCOS), a common hormone condition. Irregular periods, acne or extra body hair can add to that picture. In rare cases, certain ovarian tumors can raise AMH. A high value can’t show whether you can get pregnant right now, though it may mean a stronger response to fertility treatment. AMH can stay fairly steady through your cycle, so the test day may matter less than it does for other hormones.

Lower levels
Low AMH may suggest diminished ovarian reserve, which may mean fewer remaining follicles and a smaller response to fertility treatment. Levels can fall naturally with age, and they can also drop after ovarian surgery, chemotherapy or radiation. Hormonal birth control can lower AMH for a while. It can’t show whether you can get pregnant naturally right now or how long you can wait to try. Missed periods or hot flashes may appear if the ovaries are slowing down, though many people may notice no change.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about AMH →

These notes provide context and do not diagnose a condition.

Pituitary hormone that drives lactation; elevations can cause cycle irregularity and infertility.

Why it matters
Can be a common cause of amenorrhea, galactorrhea, and infertility in women — should be checked when periods stop or fertility issues arise.

Higher levels
High prolactin (hyperprolactinemia) may suggest a noncancerous pituitary tumor (prolactinoma), an underactive thyroid (hypothyroidism) or dopamine-blocking medicines, such as some used for mental health or nausea. It can rise naturally in pregnancy and while breastfeeding. Stress, nipple stimulation, hard exercise or poor sleep before a blood draw can bump it up. You may notice irregular or missed periods, milky nipple discharge or trouble getting pregnant, and a large growth can cause headaches or vision changes. A clinician may repeat the test and check your thyroid.

Lower levels
Low prolactin may not be a concern on its own, and it can rarely matter outside of pituitary failure. Heavy blood loss during childbirth can damage the pituitary (Sheehan syndrome), and trouble making breast milk can be an early clue. Certain medicines that act like dopamine can lower prolactin too. A low level may cause no symptoms, though pituitary problems can bring missed periods, tiredness or feeling cold. If other pituitary hormones are in question, a clinician may test those as well.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Prolactin →

These notes provide context and do not diagnose a condition.

Adrenal and ovarian androgen precursor that converts to testosterone and estrogen.

Why it matters
Can be elevated in PCOS, CAH, and androgen-secreting tumors; key marker when evaluating hirsutism, acne, or hair loss in women.

Higher levels
High androstenedione may point to polycystic ovary syndrome (PCOS), congenital adrenal hyperplasia (CAH), an inherited adrenal condition, or in rare cases an androgen-producing tumor. Because your body can turn it into testosterone, too much can show up as acne, extra facial or body hair (hirsutism), thinning scalp hair or irregular periods. Levels can vary by time of day and cycle phase, so timing can sway a result. DHEA supplements can add to it as well. Testosterone, DHEA sulfate and 17-hydroxyprogesterone may help a clinician find the source.

Lower levels
Low androstenedione may accompany adrenal insufficiency, when the adrenal glands make too little hormone, or perimenopause and menopause, when levels can fall with age. Steroid medicines and birth control pills can also lower it. On its own, a low result may not be a concern, especially after menopause. With adrenal insufficiency, you may notice tiredness, dizziness or weight loss, so a clinician may check cortisol if those symptoms are present.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Androstenedione →

These notes provide context and do not diagnose a condition.

Potent androgen converted from testosterone by 5-alpha-reductase; drives hair follicle and skin androgen effects.

Why it matters
Elevated DHT can contribute to female pattern hair loss, hirsutism, and acne, even with normal total testosterone.

Higher levels
High dihydrotestosterone (DHT) in women may play a part in thinning scalp hair (androgenic alopecia), extra facial or body hair (hirsutism) and acne. In men, it can be linked to an enlarged prostate (BPH) and pattern baldness. It can rise with PCOS or other sources of extra androgens, and testosterone use can raise it too. Many women with these concerns can have normal blood levels, partly because DHT can act mostly inside the skin. A clinician may read it alongside testosterone and other hormones.

Lower levels
Low DHT may occur with 5-alpha-reductase inhibitor use, such as finasteride or dutasteride, medicines that can block the enzyme that makes DHT. It can also come from a rare congenital 5-alpha-reductase deficiency. Since your body makes DHT from testosterone, low testosterone can bring DHT down too. In women, a low result may not be a concern on its own, and it may cause no clear symptoms. A clinician may compare it with total testosterone to get a fuller picture.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Dihydrotestosterone →

These notes provide context and do not diagnose a condition.

High-sensitivity mass-spec estradiol; accurate at very low levels (menopause, pediatric, men).

Why it matters
Preferred for postmenopausal women, on aromatase inhibitors after breast cancer, or when monitoring low-dose HRT.

Higher levels
High ultrasensitive estradiol may carry the same significance as a high standard estradiol, but this test can pick up changes at the very low end of the range. After menopause, a higher-than-expected level may come from hormone therapy, supplements or estrogen made in body fat. In rare cases, an estrogen-making tumor can be the reason. For people on aromatase inhibitors, breast cancer medicines that can lower estrogen, a level above what’s expected can be something to review with the care team. Bleeding after menopause or breast tenderness may prompt a closer look.

Lower levels
Low ultrasensitive estradiol may be expected after menopause and with aromatase inhibitors. Low values can matter more on this test, which can be used to check estrogen status in menopause, in men or in children, where standard tests can fall short. In younger women, a low level may point to ovarian insufficiency. Hot flashes, vaginal dryness or weaker bones can go along with very low estrogen. Because lab methods differ, a result from this test may not match an earlier standard estradiol.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Estradiol, ultrasensitive →

These notes provide context and do not diagnose a condition.

Estrogen made by the placenta during pregnancy; low levels may point to fetal/placental dysfunction.

Why it matters
Part of the maternal serum screen for Down syndrome and trisomy 18.

Higher levels
High estriol may be normal in pregnancy, when the placenta can make large amounts and levels can climb as the due date nears. Carrying twins can push it higher too. Outside pregnancy, an abnormally high level can be rare, though hormone creams or other products containing estriol can raise it. On its own, this number can’t show how a pregnancy is going, since it may be read with other markers and how far along you are. It may cause no symptoms that stand apart from normal pregnancy.

Lower levels
Low estriol in pregnancy may point to a problem with the placenta (placental dysfunction) or fetal complications. In prenatal screening, low estriol can be part of a pattern linked to Down syndrome or trisomy 18, and it can’t settle that question alone. Steroid medicines and a wrong due date can sway the result. Outside pregnancy, levels can be very low, and that may not be a concern. A low value may come with no symptoms, so your prenatal care team may look at the other markers and ultrasound findings.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Estriol →

These notes provide context and do not diagnose a condition.

Sum of all major estrogens (E1, E2, E3); broad estrogen status snapshot.

Why it matters
Can help evaluate overall estrogen exposure during perimenopause and hormone therapy.

Higher levels
High total estrogens may reflect natural peaks around ovulation or during pregnancy. They can also happen with estrogen from outside the body (exogenous estrogen), such as birth control pills, hormone therapy or supplements, or with an estrogen-secreting tumor. This test adds several estrogens together, so it can’t tell you which one is high. Breast tenderness, bloating or changes in your periods may appear, or you may feel no different. For questions about periods, fertility or menopause, a clinician may prefer estradiol on its own.

Lower levels
Low total estrogens may be normal in menopause, when the ovaries can make much less estrogen. At younger ages, they may reflect ovarian insufficiency, and under-eating, heavy training or breastfeeding can lower them too. Periods can become irregular or stop, and hot flashes, night sweats or vaginal dryness may follow. Because estrogen can help protect bones, long-lasting low levels can be a reason to think about bone health. A clinician may look at estradiol, FSH and your cycle history to learn more.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Total estrogens →

These notes provide context and do not diagnose a condition.

Weaker estrogen that becomes the dominant estrogen after menopause; made in fat tissue.

Why it matters
Can help evaluate estrogen status after menopause and the conversion of androgens to estrogen in obesity.

Higher levels
High estrone may be seen in obesity, because body fat can turn other hormones into estrone. After menopause, estrone made in body fat can take over as your main estrogen, so it may make up a larger share of your total. Estrogen hormone therapy, especially taken by mouth, and pregnancy can raise it too. A rare estrogen-making tumor can also be behind a high result. A high level may cause no symptoms, while some people may notice breast tenderness or irregular bleeding, and a clinician may read it with estradiol.

Lower levels
Low estrone before menopause may accompany ovarian insufficiency or hypothalamic amenorrhea, when periods can stop because of under-eating, stress or hard training. After menopause, levels can run low with low body weight, since body fat can be a main source. Aromatase inhibitors, breast cancer medicines, can lower it as well. Hot flashes, vaginal dryness or missed periods can come with low estrogen. A low result after menopause may not be a concern if you feel well.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Estrone →

These notes provide context and do not diagnose a condition.

Quantitative blood hCG; tracks pregnancy progression and can help detect ectopic or molar pregnancy.

Why it matters
Used to check for pregnancy, monitor early viability, and follow up miscarriage, ectopic, and molar pregnancy — central to early obstetric care.

Higher levels
High hCG may mean pregnancy, and levels can climb quickly in the early weeks. A higher level can occur with twins. Outside pregnancy, it may point to gestational trophoblastic disease, such as a molar pregnancy, or rare germ-cell tumors. It can stay raised for weeks after a pregnancy ends, and fertility injections containing hCG can raise it too. You may notice a missed period, nausea or breast tenderness, and a clinician may follow the trend over several days.

Lower levels
Low hCG may be normal when you’re not pregnant, and it can also read low if you test very early in pregnancy. In early pregnancy, a slow rise may point to an ectopic pregnancy, one that grows outside the uterus, or a miscarriage. One result can say less than the change over a few days, so a clinician may repeat it and may add an ultrasound. Spotting, cramps or pain on one side can go along with these problems. Severe pain or heavy bleeding can call for urgent care.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about hCG (quantitative) →

These notes provide context and do not diagnose a condition.

Mass-spec progesterone — more accurate than immunoassay, especially at low levels.

Why it matters
Preferred for postmenopausal women, on HRT, or when monitoring low-luteal-phase progesterone.

Higher levels
High progesterone on this LC/MS test may have the same interpretation as on the standard test: you may have ovulated, it can point to pregnancy, or it may suggest hyperplasia of the ovaries or adrenal glands. This method can separate progesterone from similar hormones, so it can be less prone to some mix-ups in the lab. Progesterone in pills, creams or fertility treatment can raise your level, so a clinician may ask what you take. After menopause, when levels can be very low, even a modest rise can stand out.

Lower levels
Low progesterone on this test may carry the same significance as on the standard test: no ovulation that cycle (anovulation), a luteal-phase defect or a pregnancy at risk. This method can stay accurate at low levels that standard tests can miss, so it may help after menopause or on hormone therapy. A low value can also be expected before ovulation, so the day you test can change how it’s read. You may notice short cycles, spotting or irregular periods, or you may notice nothing.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Progesterone (LC/MS) →

These notes provide context and do not diagnose a condition.

Iron storage protein; low levels may point to iron deficiency before anemia develops.

Why it matters
Menstruating women can be at high risk for iron deficiency; ferritin can be a key test — useful in fatigue, hair loss, and pregnancy planning.

Higher levels
High ferritin may point to too much stored iron (iron overload), including hemochromatosis, an inherited condition. It can also rise with inflammation, infection, liver disease or alcohol use, so a high value can't settle the question on its own. In women, periods can hide inherited iron overload until after menopause. Tiredness and joint pain may appear, and some people may feel fine. Transferrin saturation can help tell these reasons apart, and recent iron supplements can matter too.

Lower levels
Low ferritin may point to low iron stores (iron deficiency), and it can drop well before anemia appears on a blood count. Heavy periods, pregnancy, childbirth, eating little iron and gut conditions such as celiac disease can all drain your stores. You may feel tired, shed more hair than usual, feel dizzy or get restless legs, or you may have no symptoms. Inflammation can push ferritin up and hide low stores, so iron and transferrin results can add useful context.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Ferritin →

These notes provide context and do not diagnose a condition.

Iron in circulation; part of iron studies along with TIBC, ferritin, and saturation.

Why it matters
Used with ferritin and TIBC to characterize iron deficiency — can be extremely common in menstruating and pregnant women.

Higher levels
High serum iron may point to hemochromatosis, an inherited iron overload condition, to liver disease, or to hemolysis, when red blood cells break down early. A recent iron pill can also raise it for a while. Because periods can mask inherited iron overload, it may not appear in women until after menopause. Joint pain or tiredness can occur, or there may be no symptoms. Blood iron can swing from hour to hour, so one reading may mean little without ferritin and transferrin.

Lower levels
Low serum iron may point to iron deficiency, long-lasting inflammation, or too little iron from food or poor absorption. Periods, pregnancy and childbirth can all draw on iron, and conditions such as celiac disease can limit how much you absorb. Weakness, tiredness and shortness of breath can come with it. Levels can dip later in the day, and inflammation can lock iron away in storage, so a low result can't show empty stores by itself. Ferritin, TIBC and saturation can fill in the rest of the picture.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Serum iron →

These notes provide context and do not diagnose a condition.

Iron-transport protein; can rise in iron deficiency.

Why it matters
Part of comprehensive iron studies in evaluating anemia common in menstruating and pregnant women.

Higher levels
High transferrin with low ferritin may point to iron deficiency, as your body can make more of this carrier protein to grab any iron available. Heavy periods and pregnancy can both use up iron, and tiredness, hair shedding or dizziness may follow. Pregnancy and estrogen birth control can also raise transferrin even when iron is fine, so a high value can't settle things alone. Ferritin, iron and transferrin saturation can complete the picture.

Lower levels
Low transferrin may come with iron overload, long-lasting inflammation, malnutrition or liver disease, since the liver makes this protein. Kidney conditions that leak protein can lower it too. What you notice may depend on the reason, such as swelling from protein loss or the tiredness that can come with long illness. A low value can't point to a single reason by itself, so ferritin, albumin and liver tests may help work out which one fits.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Transferrin →

These notes provide context and do not diagnose a condition.

The total number of white blood cells, your immune system's frontline defense against infection.

Higher levels
A high white blood cell count (leukocytosis) may mean your body is fighting an infection or dealing with inflammation. It can also come from stress, steroid medicines, smoking or a blood disorder. Your count can naturally rise during pregnancy and right after giving birth, so a higher number then may be expected. Fever, body aches or a sore area may hint at an infection, though a mildly high count may cause no symptoms. A clinician may look at which type of white cell is raised, since that can narrow down the reason.

Lower levels
A low white blood cell count (leukopenia) may raise your risk of infection, and it can result from a viral illness, certain medicines or bone marrow problems. Autoimmune conditions such as lupus, which are more common in women, can lower it too. Low vitamin B12 or folate can sometimes play a part. A dip from a virus can bounce back within weeks, so a repeat test may be useful. You may feel fine, or you may notice fevers, mouth sores or infections that keep coming back.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about White blood cell count →

These notes provide context and do not diagnose a condition.

Number of red cells per volume; evaluates anemia and polycythemia.

Higher levels
A high red blood cell count may mean your blood is more concentrated, as can happen with dehydration, or that your body is making extra red cells. It can occur with smoking, living at high altitude, or a lung or heart condition. In rarer cases, a bone marrow disorder called polycythemia vera can be the reason. Testosterone use and sleep apnea can also push the count up. Headaches, dizziness or a flushed face may appear, though a slightly high count may cause no symptoms.

Lower levels
A low red blood cell count may mean anemia, which can come from low iron, vitamin B12 or folate, blood loss, long-term illness or reduced bone marrow production. Counts can run a bit lower in women than in men, and heavy periods can lower them further. In pregnancy, extra fluid in the blood can dilute red cells. You may feel tired, dizzy, short of breath or cold, or you may notice very little with a mild drop. Hemoglobin and red cell size can help point to the type of anemia.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Red blood cell count →

These notes provide context and do not diagnose a condition.

Oxygen-carrying protein in red blood cells; primary anemia screen.

Higher levels
High hemoglobin may reflect dehydration, smoking or living at high altitude. Less frequently, it can point to a lung or heart condition, or to a bone marrow disorder (polycythemia), where the body can make too many red blood cells. Sleep apnea and testosterone treatment can raise it too. Headaches, dizziness or a flushed face can happen, and a mild rise may cause no symptoms. Being short on fluids before a blood draw can nudge it up for a while, so a clinician may repeat the test.

Lower levels
Low hemoglobin may mean anemia. In women, iron deficiency may be the leading reason, from heavy periods, pregnancy or low iron intake. Low vitamin B12 or folate, blood loss and long-term illness can also play a part. Levels can dip naturally in pregnancy, and the normal range for women can be lower than for men. Tiredness, pale skin, shortness of breath or dizziness can follow, and a clinician may check ferritin and other iron tests to look for the reason.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Hemoglobin →

These notes provide context and do not diagnose a condition.

Percentage of blood volume that is red blood cells; can be lower in anemia.

Higher levels
High hematocrit may reflect dehydration, smoking or living at high altitude, because a larger share of your blood can be red cells. Less frequently, it can come from a bone marrow disorder that makes too many red cells, such as polycythemia vera. Severe vomiting or diarrhea can push it up for a short time. Very high values can thicken the blood and may raise the risk of clots. Some people may notice headaches, dizziness or itching after a warm shower, and others may have no symptoms.

Lower levels
Low hematocrit may point to anemia, which can come from too little iron, vitamin B12 or folate, from blood loss or from long-term illness. Heavy periods can be one of the most common reasons it drops in women. It can also dip with extra fluid in the blood, as can happen in pregnancy when blood volume grows, so results may be read with that in mind. Some people may notice tiredness, dizziness or shortness of breath with activity. A clinician may look at hemoglobin and iron tests to help sort out why.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Hematocrit →

These notes provide context and do not diagnose a condition.

The average size of your red blood cells; can be an early clue to whether an anemia is from iron deficiency, B12/folate deficiency, or another cause.

Higher levels
High MCV (macrocytosis) may mean your red blood cells are larger than average. It may point to low vitamin B12 or folate, alcohol use, an underactive thyroid (hypothyroidism) or liver disease. Some medicines, including certain chemotherapy drugs, can also raise MCV, and so can a burst of young red cells after blood loss. Pregnancy can increase how much folate your body needs, and an underactive thyroid is more common in women, so both can be worth considering. Numb or tingling hands and feet, a sore tongue or tiredness can appear with low B12, though a high MCV may also turn up with no symptoms.

Lower levels
Low MCV (microcytosis) may mean your red blood cells are smaller than average, and it may point to iron deficiency or thalassemia, an inherited blood difference. Heavy periods and pregnancy can lower iron, and thalassemia trait can be worth knowing about before pregnancy. Long-term illness can also shrink red cells, and lead exposure can do so in rare cases. Low iron can bring tiredness, brittle nails, restless legs or cravings for ice, but some people may have no symptoms. A clinician may use ferritin and a hemoglobin test to tell these reasons apart.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about MCV →

These notes provide context and do not diagnose a condition.

The average amount of hemoglobin packed into each red blood cell; helps classify the type of anemia.

Higher levels
High MCH (mean corpuscular hemoglobin) may mean each red blood cell is carrying more hemoglobin than average, which can happen when the cells are larger than normal. It can be seen in macrocytic anemias, such as those from low vitamin B12 or folate, and the body’s need for folate can climb during pregnancy. Heavy alcohol use, liver disease or an underactive thyroid (hypothyroidism) can also enlarge red cells. A very fatty blood sample or clumped red cells can falsely raise the number. Tiredness, pale skin, or numbness and tingling from low B12 can occur, and some people may feel fine.

Lower levels
Low MCH may mean your red blood cells carry too little hemoglobin, the protein that moves oxygen, so they can look small and pale. It may point to iron deficiency or other microcytic anemias, such as thalassemia, an inherited blood condition. Heavy periods, pregnancy and the months after giving birth can drain iron stores, which can make this pattern more common in women. You may notice tiredness, shortness of breath, dizziness or cold hands, or you may not notice anything. Ferritin and MCV can help a clinician work out which reason fits.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about MCH →

These notes provide context and do not diagnose a condition.

The concentration of hemoglobin within red cells; helps distinguish types of anemia.

Higher levels
High MCHC may mean hemoglobin is packed unusually tightly inside your red blood cells, a finding that can be uncommon. It can occur in hereditary spherocytosis, an inherited condition that makes red cells round and fragile, or in autoimmune hemolytic anemia, when the immune system breaks down red cells. Certain lab interferences can also raise the number, including cold agglutinins (antibodies that clump red cells), very fatty blood or a damaged sample. When red cells are breaking down, you may notice tiredness, yellowish skin or dark urine. A clinician may repeat the test or review a blood smear before reading much into it.

Lower levels
Low MCHC may mean your red blood cells hold less hemoglobin than expected and look paler (hypochromic), classically from iron deficiency. It can also occur with thalassemia, an inherited blood condition, or with long-term illness. Periods and pregnancy can use up iron, so women can be more prone to this result. MCHC can change later than MCV and other red cell measures, so it may look normal early in iron deficiency. Symptoms can include tiredness, pale skin, headaches or shortness of breath with activity, although a mild drop may go unnoticed.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about MCHC →

These notes provide context and do not diagnose a condition.

How much your red blood cells vary in size; can help pinpoint the cause of anemia and can flag early nutrient deficiencies.

Higher levels
A high RDW (red cell distribution width) may mean your red cells vary widely in size, and it can be an early clue to low iron, vitamin B12 or folate, or a mixed anemia. With periods and pregnancy, iron can run low, and RDW can rise before hemoglobin drops. Recent blood loss, a blood transfusion or liver disease can also widen it. Tiredness or pale skin may come from the reason behind it, not from RDW itself. Read with MCV, it can help a clinician sort out which nutrient or condition may be involved.

Lower levels
A low RDW may mean your red cells are very uniform in size, and a low or normal RDW may not be a concern on its own. This result can’t rule out anemia, since red cells can be small or large and still match one another. A normal RDW with a low MCV can fit thalassemia trait, an inherited blood difference that can be worth knowing about before pregnancy. A low RDW itself may cause no symptoms, so a clinician may focus on your hemoglobin and other red cell numbers.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about RDW →

These notes provide context and do not diagnose a condition.

Number of platelets in blood; low counts can increase bleeding risk.

Higher levels
High platelets (thrombocytosis) may happen with iron deficiency, inflammation, infection or recent surgery, and after spleen removal (post-splenectomy). In some cases, a bone marrow condition called a myeloproliferative disease can be the reason. Heavy periods can lower iron, and low iron can push platelets up, so women may see these results together. Many people may have no symptoms, while very high counts can bring headaches, dizziness, clots or bleeding. A clinician may check ferritin or signs of inflammation and repeat the count.

Lower levels
Low platelets (thrombocytopenia) may mean your blood clots less easily, and they can raise your risk of bleeding. They can happen with immune thrombocytopenia (ITP), some medicines, liver disease, alcohol use or bone marrow suppression. A mild drop can occur late in pregnancy, and a low count can also be part of preeclampsia, a high blood pressure problem in pregnancy. Easy bruising, nosebleeds, heavy periods or tiny red spots on the skin (petechiae) may appear, though a mild drop may cause no symptoms. Platelets can clump in the collection tube, which can make the count look falsely low.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Platelet count →

These notes provide context and do not diagnose a condition.

The average size of your platelets; younger, larger platelets may suggest the marrow is actively producing them.

Higher levels
High MPV (mean platelet volume) may mean your platelets are newer and larger than average, which can happen when your bone marrow speeds up production after platelet loss. It can be seen with immune thrombocytopenia (ITP), a condition more common in women in which the immune system destroys platelets by mistake. Some inherited platelet conditions and bone marrow disorders can raise MPV too. Platelets can also swell if the sample sits before testing. Easy bruising or heavy periods may come from a low platelet count rather than from MPV itself, so this result can be read with that count.

Lower levels
Low MPV may mean your platelets are smaller than average, which can occur with bone marrow production problems, such as after chemotherapy or in aplastic anemia. Certain inherited conditions can also lower it. MPV can say little on its own, so a clinician may read it with your platelet count and the rest of your blood work. A low value with a normal platelet count may not be a concern. If platelets are also low, you may notice easy bruising, nosebleeds or heavier periods, though some people may feel nothing.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about MPV →

These notes provide context and do not diagnose a condition.

The percentage of neutrophils, your most abundant white cell and first responder to bacterial infection.

Higher levels
High neutrophils (neutrophilia) may mean your body is responding to a bacterial infection, inflammation or stress. Steroid medicines can raise the percentage, and so can smoking or a hard workout shortly before your blood draw. Levels can also rise naturally during pregnancy, so a higher result then may be expected. Because this is a share of your white cells, it can look high when lymphocytes are low. Fever, pain or redness may point to an infection, while a high result with no symptoms may settle on a repeat test.

Lower levels
A low neutrophil percentage may follow a viral infection or bone marrow suppression, and when the absolute count is also low (neutropenia), it can raise your risk of infection. Some medicines, including chemotherapy, can lower neutrophils, and autoimmune conditions such as lupus, which are more common in women, can do the same. Low vitamin B12 or folate can play a part too. Some people of African or Middle Eastern ancestry can naturally run lower without any problem. Because this is a share of your white cells, it can also look low when lymphocytes are high. Mouth sores, fevers or repeated infections may be clues, and a clinician may check your absolute neutrophil count.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

These notes provide context and do not diagnose a condition.

The percentage of lymphocytes, the white cells (T, B, and NK cells) that run your adaptive immune response.

Higher levels
A high lymphocyte percentage can go along with viral infections such as mono and some long-lasting immune conditions. This is a share, so it can also look high when neutrophils fall, and the absolute lymphocyte count may tell a clinician more. A recent cold or flu can keep it up for a while as you recover. A sore throat, swollen glands or tiredness can come with it. If the share stays high once you're well, a clinician may look more closely at your blood count.

Lower levels
A low lymphocyte percentage can follow a sudden illness, steroid use or immune suppression, and it may raise infection risk. In pregnancy the share can look lower simply because other white cells rise. A bacterial infection can do the same by lifting neutrophils. Lupus can lower lymphocytes too, and it can be more common in women. A low share with a normal absolute lymphocyte count may matter less, so a clinician may read the two together.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Lymphocytes →

These notes provide context and do not diagnose a condition.

The percentage of monocytes, white cells that clear debris and become tissue macrophages during infection and healing.

Higher levels
High monocytes (monocytosis) may mean your body is recovering from an infection or dealing with a long-lasting infection or inflammation. It can happen with tuberculosis, inflammatory bowel disease or autoimmune conditions such as rheumatoid arthritis, which is more common in women. Certain blood disorders can raise them too. Because this is a percentage, it can climb when other white cells fall, so a clinician may check the absolute monocyte count. A small rise on its own may not be a concern, and any symptoms can depend on the reason behind it.

Lower levels
Low monocytes (monocytopenia) may occur with acute stress, steroid medicines or bone marrow suppression, such as from chemotherapy. Some blood disorders and severe infections can lower them as well. Because this result is a share of your white cells, it can drop when neutrophils surge, even if your actual monocyte number is fine. A slightly low percentage may matter very little by itself, and there may be no symptoms. Repeated infections can be a reason for a clinician to look closer at the full white cell count.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Monocytes →

These notes provide context and do not diagnose a condition.

The percentage of eosinophils, white cells that fight parasites and drive allergic inflammation.

Higher levels
High eosinophils may point to allergies, asthma, eczema, a parasitic infection, a reaction to a medicine or, rarely, a blood disorder. Hay fever can push this share up as well, and asthma can be more common in adult women than in men. Because this is a percentage, it can look high just because another type of white cell has dropped, so a clinician may check the absolute eosinophil count too. Sneezing, wheezing or itchy, irritated skin can come with it, depending on the reason.

Lower levels
Low eosinophils can be common with stress or steroid use, and they may not be a concern. This share can sit close to zero in healthy people, because eosinophils may be few in number to start with. A sudden illness can push the percentage down for a short time, and it can bounce back once you recover. The share can also fall if neutrophils rise, as can happen during a bacterial infection. You may not notice anything from a low result.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Eosinophils →

These notes provide context and do not diagnose a condition.

The percentage of basophils, the rarest white cell, which release histamine in allergic and inflammatory reactions.

Higher levels
High basophils can accompany allergies, long-lasting inflammation or, rarely, blood disorders such as chronic myeloid leukemia. This result is a share of your white cells, so it can look high when other cells fall, and the absolute basophil count may give a clearer picture. Small shifts can be common and may not matter on their own, and there may be no separate range for women. Some people may notice itching, hives or other allergy symptoms, while others may notice nothing.

Lower levels
Low basophils may occur with a sudden infection, stress or an overactive thyroid (hyperthyroidism). Because basophils make up such a tiny share of white cells, this percentage can read near zero in healthy people. The share can also drop if another type of white cell rises, as can happen during an infection. Steroid medicines can lower it too. A low percentage may not cause symptoms by itself, and there may be no need to follow it up unless other results are off.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Basophils →

These notes provide context and do not diagnose a condition.

Immunofluorescence-based ANA screen with automatic titer, pattern, and 11-antibody follow-up if positive.

Why it matters
Comprehensive autoimmune workup — useful given women's elevated risk for lupus, Sjögren's, scleroderma, and mixed connective tissue disease.

Higher levels
A positive ANA may mean your immune system is making antibodies that target your own cells, and it may point to an autoimmune condition such as lupus, Sjögren's, scleroderma or autoimmune hepatitis. A higher titer or certain patterns can add weight, and the follow-up antibody panel can help narrow things down. Healthy women can also test positive, and so can older adults and people on some medicines. Joint pain, rashes, dry eyes or mouth, and tiredness can all be clues. Since lupus can begin during the childbearing years, this result may be most useful alongside your symptoms.

Lower levels
A negative ANA may lower the odds of a body-wide autoimmune condition such as lupus, and it can't rule one out on its own. With this reflex test, a negative screen can mean the lab stops there, so no titer, pattern or follow-up antibodies may be reported. Some autoimmune conditions, including ones that affect a single organ, can test negative too. If joint pain, rashes, dry eyes or other symptoms continue, a clinician may order more specific antibody tests or repeat this one later.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about ANA screen →

These notes provide context and do not diagnose a condition.

ESR — nonspecific inflammation marker.

Why it matters
Can be elevated in autoimmune diseases that disproportionately affect women (lupus, RA, polymyalgia rheumatica).

Higher levels
High sed rate (ESR) may mean there's inflammation somewhere in your body, but this nonspecific test can't show where or why. It can rise with infection, autoimmune disease such as lupus or rheumatoid arthritis, and cancer. Age, pregnancy, anemia and kidney disease can push it up too, and women can run a little higher than men. Shoulder and hip stiffness in an older woman may bring up polymyalgia rheumatica. Repeating it over time can help follow a condition, and CRP can add detail.

Lower levels
Low sed rate (ESR) may not be a concern on its own, and it may simply mean there's little inflammation right now. Very low values can occur with polycythemia, when the blood has too many red cells, or with sickle cell disease, since the number and shape of red cells can change how they settle. Medicines that calm inflammation can bring it down as well. A low result can't rule out every inflammatory condition, and CRP may add detail if symptoms continue.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about ESR →

These notes provide context and do not diagnose a condition.

Older RA autoantibody; less specific than CCP but still part of the workup.

Why it matters
RA is 2–3x more common in women, often presenting during reproductive years.

Higher levels
High rheumatoid factor may point to rheumatoid arthritis (RA), but it can also appear with Sjögren's, a dry eye and mouth condition, with long-lasting infections, and with aging. RA and Sjögren's can both be more common in women. Stiff or swollen joints, dry eyes or a dry mouth may be clues, though some healthy older adults can test positive with no symptoms. One result can't name the reason, and the CCP antibody can be more specific for RA.

Lower levels
A negative rheumatoid factor can't rule out rheumatoid arthritis (RA), especially early in the disease, though it may ease concern. Some people with RA can stay negative for this antibody throughout (seronegative RA), and they can still have joint damage. The CCP antibody can be more specific, so a clinician may check it too. If morning stiffness or swollen joints continue, an exam, imaging or inflammation tests such as CRP may help sort out the reason.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Rheumatoid factor →

These notes provide context and do not diagnose a condition.

Highly specific autoantibody for rheumatoid arthritis; can be positive before symptoms appear.

Why it matters
RA is 2–3x more common in women, often presenting during reproductive years and affected by pregnancy and menopause.

Higher levels
A positive CCP antibody may point to rheumatoid arthritis (RA), a condition where the immune system can attack the lining of the joints. This antibody can be highly specific for RA, and it can appear years before joints start to hurt. Swollen or painful joints in the hands and feet, along with morning stiffness, may follow. RA can be more common in women, and it may ease in pregnancy, then flare in the months after birth. Smoking can raise the chance of RA, and imaging can help check for early joint damage.

Lower levels
A negative CCP antibody may lower the odds of rheumatoid arthritis (RA), and it can't rule RA out. Some people can have RA without this antibody (seronegative RA), and it may be missing early on. Joint pain can also come from other conditions, such as osteoarthritis or lupus. A clinician may look at rheumatoid factor, inflammation tests such as CRP or sed rate, and an exam of the joints when pain or swelling continues.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about CCP antibody (IgG) →

These notes provide context and do not diagnose a condition.

Acute-phase protein that can rise with inflammation, infection, or tissue damage.

Why it matters
Affects drug binding (especially in pregnancy) and can be elevated in inflammatory conditions more common in women.

Higher levels
High alpha-1-acid glycoprotein may point to acute or long-lasting inflammation, an infection, or tissue damage from an injury or surgery, since the liver can make more of this protein when the body is under strain. It's a general acute-phase marker, so it can't show where the problem is or what started it. Fever, pain or swelling may come from the underlying problem. Autoimmune conditions can raise it too, and they can be more common in women. CRP, sed rate and your symptoms can help fill in the picture.

Lower levels
Low alpha-1-acid glycoprotein may be uncommon, and a mildly low value may not be a concern on its own. Lower values can happen with severe liver disease, since the liver makes this protein, or when the body loses protein through the kidneys or gut. Levels can also run lower in pregnancy and with estrogen birth control. Because this protein carries many medicines through the blood, a change can affect how some drugs bind.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Alpha-1 acid glycoprotein →

These notes provide context and do not diagnose a condition.

Antiphospholipid antibody; persistently positive results may suggest antiphospholipid syndrome (APS), a clotting disorder.

Why it matters
APS can cause recurrent pregnancy loss, preeclampsia, and stillbirth — testing can matter for women with unexplained miscarriages.

Higher levels
High cardiolipin IgG may point to antiphospholipid syndrome (APS), a condition that can cause blood clots and pregnancy loss, especially when the antibody stays high on repeat testing. One positive result can't settle it, since infections and some medicines can raise it briefly, so a clinician may recheck it a few months later. Lupus can come with these antibodies too. Some women may have repeated miscarriages or preeclampsia, and a clot can bring a swollen, painful leg. Estrogen birth control and pregnancy can add to clot risk.

Lower levels
Low or negative cardiolipin IgG may make antiphospholipid syndrome (APS) less of a concern, and it can't rule APS out on its own. Some people with APS can have other antiphospholipid antibodies instead, so a clinician may look at lupus anticoagulant, beta-2 glycoprotein I and the IgM version of this test. A full set can be useful after a blood clot, repeated miscarriage or stillbirth. Without a history of clots or pregnancy problems, a negative result may need no follow-up.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Cardiolipin antibody (IgG) →

These notes provide context and do not diagnose a condition.

IgM antiphospholipid antibody; combined with IgG can help identify antiphospholipid syndrome.

Why it matters
Part of recurrent miscarriage workup; APS is treatable with anticoagulation during pregnancy to improve live-birth rates.

Higher levels
High cardiolipin IgM may mean recent immune activation, and it may add to the picture for antiphospholipid syndrome (APS). The IgM type can be less specific for APS than IgG, and a low-level positive can happen after an infection or even in healthy people. For that reason, a clinician may repeat it a few months later and read it with the IgG type. APS can bring blood clots or pregnancy loss, and it can appear alongside lupus. Clot risk can also climb with estrogen birth control or pregnancy.

Lower levels
Low or negative cardiolipin IgM may lower the suspicion of antiphospholipid syndrome (APS), and one result can't clear the question alone. IgM can be just one piece of the puzzle, because some people may test positive only for the IgG type, beta-2 glycoprotein I or lupus anticoagulant. A clinician may read it with those tests, especially after a clot or a pregnancy loss. In someone with no such history, a negative result may need no further testing.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Cardiolipin antibody (IgM) →

These notes provide context and do not diagnose a condition.

Celiac disease antibody; more useful than older anti-gliadin tests and especially helpful in IgA-deficient patients.

Why it matters
Celiac disease prevalence can be higher in women and can present as iron-deficiency anemia, infertility, or osteoporosis.

Higher levels
High deamidated gliadin IgG may point to celiac disease, when gluten can trigger the immune system to damage the small intestine. This test can be especially helpful in people with low IgA, since the standard tTG IgA test can look normal in them. In women, celiac disease can appear as low iron, early bone thinning or trouble getting pregnant, and some may have bloating, diarrhea or no gut symptoms at all. tTG antibodies and a small-bowel biopsy can help settle the question.

Lower levels
Low or negative deamidated gliadin IgG may ease concern about celiac disease, and it can't rule out non-celiac gluten sensitivity, which has no blood test that can find it. Eating little or no gluten before the draw can lower these antibodies, so the result may read falsely low. If bloating, low iron or other symptoms continue, a clinician may ask about your diet and may add tTG antibodies or genetic testing for celiac risk.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Gliadin antibody (IgG) →

These notes provide context and do not diagnose a condition.

Autoantibody specific for antisynthetase syndrome, a subset of inflammatory myositis with lung involvement.

Why it matters
Inflammatory myopathies disproportionately affect women; Jo-1+ disease can have high pulmonary mortality if missed.

Higher levels
A positive Jo-1 antibody may point to antisynthetase syndrome, a rare form of inflammatory muscle disease (polymyositis or dermatomyositis) that can also scar the lungs (interstitial lung disease). This antibody can be highly specific for the condition. Muscle weakness, a lasting cough, shortness of breath, joint pain, fingers that turn white in the cold, and rough, cracked skin on the hands can all be part of it. Inflammatory muscle conditions can affect women more than men, so a clinician may add muscle enzyme tests and lung imaging to look closer.

Lower levels
A negative Jo-1 antibody may make antisynthetase syndrome less of a worry, and it can't rule out muscle or lung inflammation on its own. Other antibodies can be found in related conditions, so a clinician may order a wider myositis panel. Muscle weakness can also come from thyroid problems, low vitamin D or some medicines, including statins, which can make muscles ache. A lasting cough or breathlessness may need its own lung checks.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Jo-1 antibody →

These notes provide context and do not diagnose a condition.

First-line celiac disease antibody.

Why it matters
Celiac is 2–3x more common in women, often presenting with anemia, infertility, or recurrent miscarriage.

Higher levels
High tTG IgA may point to celiac disease, and it can be a strong clue, since this first-line test can be both sensitive and specific for it. Higher levels can add weight, while a small rise can happen with other autoimmune or liver conditions. In women, celiac disease can appear as low iron that keeps coming back, early bone thinning or trouble getting pregnant, sometimes with no stomach symptoms. A clinician may add other celiac tests or a small-bowel biopsy. Ask your clinician before cutting gluten, because that can change follow-up results.

Lower levels
Low or negative tTG IgA may lower the odds of celiac disease, unless you have IgA deficiency, which can make this test look normal even when celiac is present. A total IgA check can sort that out, and a clinician may switch to the IgG version if your IgA is low. Eating little or no gluten before the draw can also lower the result. If low iron or gut symptoms continue, other reasons may need a look too.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about tTG antibody (IgA) →

These notes provide context and do not diagnose a condition.

IgG version used when patient is IgA-deficient.

Why it matters
Important alternative for the ~1 in 500 women with selective IgA deficiency.

Higher levels
High tTG IgG may point to celiac disease, especially in people with IgA deficiency, who can't make enough of the antibody the standard test looks for. When IgA is normal, this version can be less specific, so a clinician may read it with tTG IgA, total IgA and deamidated gliadin tests. Celiac disease can be more common in women and may appear as ongoing low iron, early bone thinning or trouble getting pregnant. Belly pain or bloating may come with it, though some people may have no gut symptoms.

Lower levels
Low or negative tTG IgG with a normal IgA level may make celiac disease less of a concern. It can't rule celiac out on its own, especially if you've cut back on gluten, since these antibodies can fall without it. If your total IgA is normal, the tTG IgA test can be the more useful of the two, so a clinician may look at that result first. Ongoing gut symptoms or unexplained low iron may still call for a closer look.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about tTG antibody (IgG) →

These notes provide context and do not diagnose a condition.

Acute-phase protein that can rise with systemic inflammation.

Why it matters
Can be elevated in autoimmune flares (lupus, RA) which are more prevalent in women, and during pregnancy complications like preeclampsia.

Higher levels
High CRP may mean there's inflammation somewhere in your body, from an infection, an injury, surgery or a flare of a condition such as rheumatoid arthritis. It can rise within hours and fall as you recover, so it can help track an illness, but it can't show where the inflammation is. Late pregnancy, estrogen birth control, smoking and carrying extra weight can nudge it up a little, and preeclampsia may raise it as well. You may notice fever, pain, swelling or stiff joints, or you may feel fine.

Lower levels
Low CRP may mean there's little active inflammation in your body right now, and it may not be a concern on its own. It can't rule out every problem, because some conditions, such as lupus, can flare with only a small rise. CRP can also take hours to climb, so a test very early in an illness can read low. Steroids and other medicines that calm inflammation can lower it as well. If symptoms continue, a repeat test or a sed rate may help.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about C-Reactive Protein (CRP) →

These notes provide context and do not diagnose a condition.

Bone resorption marker that can show how fast bone is being broken down.

Why it matters
Critical for monitoring osteoporosis treatment in postmenopausal women and assessing fracture risk.

Higher levels
High CTx may mean your bones are being broken down faster than usual (bone resorption). It can happen after menopause, when falling estrogen can speed up bone loss, and with osteoporosis, an overactive thyroid (hyperthyroidism), overactive parathyroid glands (hyperparathyroidism) or other untreated bone disease. A recent fracture can raise it for a while too. Bone loss can be silent until a bone breaks. Levels can swing with time of day and meals, so a fasting morning sample may be easier to compare over time.

Lower levels
Low CTx may mean bone breakdown has slowed down. It can be an expected effect of osteoporosis medicines such as bisphosphonates, and a clinician may use it to see how treatment is working. Menopausal hormone therapy can lower it too. Because CTx can drop after eating and later in the day, a sample taken after a meal may read low. A low value can't show that your bones are strong, so it may be read with a bone density scan.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about CTx →

These notes provide context and do not diagnose a condition.

Parathyroid hormone — regulates calcium and bone metabolism.

Why it matters
Hyperparathyroidism is more common in postmenopausal women and can accelerate osteoporosis; key bone workup component.

Higher levels
High PTH may mean different things depending on your calcium level. With high calcium, it may point to primary hyperparathyroidism, when one or more parathyroid glands are overactive, which can be more common after menopause. With low or normal calcium, it may point to low vitamin D or chronic kidney disease. Kidney stones, bone pain, tiredness or thirst can occur, and some people may have no symptoms. Lithium and some other medicines can raise it too, so a clinician may check calcium, vitamin D and kidney function together.

Lower levels
Low PTH with low calcium may point to hypoparathyroidism, which can happen after thyroid or neck surgery. Low PTH with high calcium may point to extra calcium coming from another source, such as cancer (malignancy), a granulomatous disease like sarcoidosis, or too much vitamin D (vitamin D toxicity). Low magnesium can also lower PTH, and biotin can interfere with some PTH tests. When calcium runs low, you may notice tingling around the mouth or in the fingers, or muscle cramps.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about PTH →

These notes provide context and do not diagnose a condition.

Bone formation marker (P1NP); can rise with new bone formation.

Why it matters
Standard for monitoring response to osteoporosis treatment in postmenopausal women alongside CTx.

Higher levels
High P1NP may mean your body is building new bone at a faster pace. It can happen during teen growth, while a fracture heals, with Paget's disease of bone, or as a bone-building osteoporosis medicine takes effect. Bone turnover can also speed up around menopause, so P1NP may rise along with CTx. Paget's disease can bring bone pain, while other reasons may cause no symptoms. A high value can't show on its own that bones are getting stronger, so a bone density scan can add what this test leaves out.

Lower levels
Low P1NP may mean your body is making less new bone. It can be an expected effect of bisphosphonates, which can slow bone turnover, and it can also happen with age-related bone loss. Long-term steroid medicines can reduce bone building as well. Slow bone building can be silent, with nothing to feel. Change over time can say more than one number, so an earlier result or a CTx level can help.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about P1NP →

These notes provide context and do not diagnose a condition.

Fat-soluble vitamin essential for clotting and bone health.

Why it matters
Important for bone health in postmenopausal women and for preventing newborn hemorrhagic disease.

Higher levels
High vitamin K may come from supplements or a recent meal rich in leafy greens, since this test can track what you ate lately. High triglycerides can raise the reading too, because vitamin K can travel with fats in the blood. On its own, a high value may not be harmful. If you take warfarin, a big change in vitamin K can affect how that medicine works, so it can help to tell your clinician about any supplements.

Lower levels
Low vitamin K may slow blood clotting and can affect bone health. It can happen with gut conditions that limit how you absorb fat, long courses of antibiotics, or warfarin, a blood thinner that can block how the body uses vitamin K. You may notice easy bruising, nosebleeds, or periods that are heavier or last longer than usual. Because this level can change with recent meals, one low value may not point to a long-term shortage, and clotting tests such as PT/INR can add detail.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Vitamin K →

These notes provide context and do not diagnose a condition.

Antibody class found in mucosal surfaces; low levels may suggest IgA deficiency which can affect celiac testing.

Why it matters
Selective IgA deficiency can be screened for alongside celiac testing to avoid false negatives.

Higher levels
High IgA may point to a long-lasting infection, liver disease or an autoimmune condition, such as rheumatoid arthritis, lupus, celiac disease or IgA nephropathy, a kidney condition. In rarer cases, it may point to multiple myeloma, a cancer of the cells that make antibodies. A mild rise can cause no symptoms at all, while blood in the urine may be a clue with IgA nephropathy. Comparing IgA with IgG and IgM, or adding a blood test called protein electrophoresis, can help narrow things down.

Lower levels
Low IgA may point to selective IgA deficiency, the most common primary immunodeficiency, and many people with it can feel well. Others may get more sinus, lung or gut infections, and the condition can raise the chance of autoimmune problems. Some seizure medicines can also lower IgA. For women being checked for celiac disease, low IgA can matter a lot, because the main celiac blood test can look normal even when celiac is present. An IgG-based celiac test may be used instead.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about IgA →

These notes provide context and do not diagnose a condition.

Antibody mediating allergic reactions; total IgE can rise in allergy, asthma, and parasitic infection.

Why it matters
Allergic disease is more common in adult women; baseline helpful in evaluating chronic urticaria, asthma, and eczema.

Higher levels
High IgE may point to allergies, asthma or eczema (atopy), or to a parasite infection. Rarely, very high levels can come with hyper-IgE syndrome, an inherited immune condition. You may notice sneezing, itchy skin, wheezing or hives, or you may feel fine, and smoking can nudge the number up as well. A high total can't show what you're allergic to, so a clinician may add tests for specific allergens. Asthma can also change around your period or in pregnancy, which can help put symptoms in context.

Lower levels
Low IgE may not be a concern on its own, and many healthy people can have very little of it in their blood. A low total can't rule out an allergy, because someone can still react to one food or pollen with a low or normal total. If sneezing, hives or wheezing continue, a clinician may order tests for specific allergens. With repeated infections, other antibodies such as IgG and IgA may be worth checking, since immune conditions can lower more than one.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about IgE →

These notes provide context and do not diagnose a condition.

Main antibody class; can reflect long-term immune memory and immune competence.

Why it matters
Low IgG can affect vaccine response and infection risk; key in preconception/pregnancy planning, especially with autoimmune disease.

Higher levels
High IgG may point to a long-lasting infection, an autoimmune condition, chronic liver disease or a rise in one single type of antibody (monoclonal gammopathy), including multiple myeloma. Autoimmune conditions tied to high IgG, such as lupus and Sjögren's, can be more common in women, and they may bring joint pain, tiredness, or dry eyes and mouth. A mild rise can also go unnoticed. Serum protein electrophoresis can tell a broad rise apart from one made by a single group of cells.

Lower levels
Low IgG may point to a primary immunodeficiency such as common variable immune deficiency (CVID), or to losing protein through the kidneys or gut. Medicines that calm the immune system, such as steroids, can lower it too. Levels can also dip in pregnancy as extra fluid dilutes the blood. Frequent or stubborn sinus, chest or ear infections may be a clue, and vaccines may not work as well. IgG can cross the placenta to protect a baby, so this result may matter if you're planning a pregnancy.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about IgG →

These notes provide context and do not diagnose a condition.

Mast cell enzyme; can be elevated in mastocytosis, anaphylaxis, and mast cell activation syndrome.

Why it matters
MCAS is more common in women and can present with cyclical symptoms, GI issues, and pregnancy intolerance.

Higher levels
High tryptase may mean mast cells, immune cells that set off allergic reactions, have released their contents. A sharp rise soon after a severe reaction may point to anaphylaxis, while a high level on an ordinary day may point to mastocytosis, mast cell activation syndrome or an inherited trait called hereditary alpha-tryptasemia. Kidney disease can raise it too. Flushing, hives, stomach cramps and faintness can all come with mast cell problems. A result taken during symptoms can say more when it's compared with your baseline.

Lower levels
Low tryptase may be a normal result and may need no follow-up. It can't rule out allergy, because many allergic reactions, especially to food, can happen without a clear rise. A sample taken many hours after a reaction can also read low, since tryptase can fall back quickly. If you get repeated flushing, hives or stomach cramps, a clinician may look for a rise above your baseline during an episode rather than rely on one quiet-day number.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Tryptase →

These notes provide context and do not diagnose a condition.

Detects past or chronic exposure to Candida yeast.

Why it matters
Recurrent vaginal candidiasis affects ~10% of women; can help identify chronic mucocutaneous candidiasis or immune deficiency.

Higher levels
High Candida albicans IgG may mean your immune system has reacted to this yeast, now or in the past. Candida can live on healthy skin and in the gut and vagina, so many healthy people can carry these antibodies. That is why this result can't tell you whether a current infection comes from yeast, and a swab may be a better check. Vaginal yeast infections can cause itching, burning or thick discharge. If they keep coming back, a clinician may look at your blood sugar and, rarely, at how your immune system is working (immune deficiency).

Lower levels
Low or negative Candida albicans IgG may mean your immune system has made little antibody against this yeast. It can't rule out a yeast infection on its own, because a vaginal or skin infection may not raise antibodies in the blood. People with weakened immune systems may also make fewer antibodies, which can make the result hard to read. If you notice itching, burning or unusual discharge, a clinician may use a swab to check for yeast directly, whatever this result says.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Candida antibody (IgG) →

These notes provide context and do not diagnose a condition.

Detects recent or active CMV infection.

Why it matters
CMV is the most common congenital infection in the U.S.; primary infection during pregnancy can cause severe fetal complications.

Higher levels
High or positive CMV IgM may mean a recent or active cytomegalovirus (CMV) infection. IgM can linger for months, can return when an old infection wakes up and can sometimes read falsely positive, so a clinician may add other tests, such as CMV IgG and avidity, to tell a new infection from an old one. This can matter most in pregnancy, because a first infection can reach the baby and can cause hearing loss. Some people may notice fever, tiredness or swollen glands, and many may feel nothing. Toddlers can carry CMV in saliva and urine, so parents and childcare workers can have more exposure.

Lower levels
Low or negative CMV IgM may mean there is no recent CMV infection, but it can't rule one out on its own. Testing very early can miss an infection, since antibodies can take time to appear. This result also can't speak to past exposure, so a clinician may check CMV IgG, which can stay positive for life. In pregnancy, a clinician may repeat testing after a flu-like illness, since CMV can spread from young children through saliva and urine.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about CMV antibody (IgM) →

These notes provide context and do not diagnose a condition.

Marker of active or recently active EBV infection; can be elevated in chronic active EBV.

Why it matters
Increasingly linked to autoimmune diseases (especially MS and lupus) that disproportionately affect women.

Higher levels
High or positive EBV early antigen D IgG may mean an active or recently reactivated Epstein-Barr virus (EBV) infection, the virus behind mono (infectious mononucleosis). These antibodies can appear during a new infection, and they can stay positive for years in some healthy people. A clinician may read this result with other EBV antibody tests to help tell a recent infection from an old one. Mono can bring weeks of tiredness, sore throat and swollen glands. Long-lasting tiredness can have many sources, including low iron and thyroid problems, so this result can't explain it alone.

Lower levels
Low or negative EBV early antigen D IgG may mean there is no current EBV reactivation, though it can't rule out an active infection on its own. You may still have met the virus in the past, since most people catch EBV at some point, and this antibody can fade while others stay. Some people may not make this antibody even during mono. A clinician may check VCA and EBNA antibodies for the full timeline, and may look at your iron and thyroid results if tiredness continues.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about EBV early antigen antibody (IgG) →

These notes provide context and do not diagnose a condition.

Two-tier Lyme disease testing — screening assay with confirmatory Western blot.

Why it matters
Chronic Lyme symptoms (fatigue, joint pain) overlap with autoimmune disease, which is more common in women — accurate testing is key.

Higher levels
High or positive Lyme antibodies may mean a current or past infection with Borrelia, the bacteria spread by tick bites. If the first screen is positive or unclear, the lab can automatically run a second, more detailed test (Western blot), and a positive first screen alone can be a false alarm. Antibodies can last for years, so this result can't tell an old infection from a new one. Lyme can cause tiredness, a spreading rash, fever and achy, swollen joints, which can look like rheumatoid arthritis or lupus, conditions more common in women.

Lower levels
Low or negative Lyme antibodies may mean Lyme disease isn't behind your symptoms, but this result can't rule it out in very early infection. Antibodies can take several weeks to appear, so a test done soon after a tick bite may come back negative, and a clinician may repeat it later. A typical spreading rash may matter more than an early blood test. Tiredness and joint pain can also come from conditions more common in women, such as rheumatoid arthritis, lupus or thyroid problems, so a clinician may look at those next.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Lyme disease antibodies →

These notes provide context and do not diagnose a condition.

Checks immunity to rubella (German measles).

Why it matters
Critical preconception test — rubella infection in pregnancy can cause severe congenital defects; non-immune women can ask a clinician about vaccination before conception.

Higher levels
High or positive rubella IgG may mean you are protected against rubella (German measles), through a past vaccine or a past infection. This result can be reassuring before pregnancy, because rubella early in pregnancy can lead to miscarriage or a baby born with hearing, eye or heart problems (congenital rubella syndrome). IgG can't tell a vaccine from a past infection, and it can't date when you were exposed. After a recent rash or known exposure, a clinician may order other rubella tests, such as IgM, to sort out the timing.

Lower levels
Low or negative rubella IgG may mean you are not protected (non-immune) against rubella, also called German measles. This can matter most in pregnancy, since catching rubella can put a baby at risk of congenital rubella syndrome, including hearing, eye and heart problems. Checking before you get pregnant can leave time to ask your clinician about vaccination, because the rubella vaccine can't be given during pregnancy. A result near the lab's cutoff may need repeating, and antibody levels can fade in the years after a vaccine.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Rubella immunity (IgG) →

These notes provide context and do not diagnose a condition.

Measures recent arsenic exposure from water, food, or occupational sources.

Why it matters
Arsenic can cross the placenta and may be linked to pregnancy loss, low birth weight, and developmental issues — relevant for women of childbearing age.

Higher levels
High blood arsenic may mean recent exposure, because arsenic can clear from the blood quickly. It can come from contaminated well water, rice and other foods, or industrial work. Seafood can raise the level too, though much of its arsenic is an organic form that may be less toxic. Short, heavy exposure can cause vomiting, diarrhea and belly pain, while long-term exposure can cause skin changes or numbness in the hands and feet. Arsenic can cross the placenta, so exposure may matter more during pregnancy, and a clinician may follow up with a urine test that can separate seafood arsenic from more toxic forms.

Lower levels
Low blood arsenic may mean no recent exposure of concern, and it's the result you'd hope to see. Your body has no known need for arsenic, so a low value may not be a concern. Because arsenic can leave the blood quickly, a low result can't rule out exposure from more than a few days ago. Water from a private well can still carry arsenic, since no public utility checks it. A urine test can pick up exposure over a slightly longer window, and a test of the water itself can check a well.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Arsenic →

These notes provide context and do not diagnose a condition.

Toxic heavy metal from smoking, food, and industrial exposure that accumulates in kidneys and bones.

Why it matters
Can cross the placenta, may increase osteoporosis and breast cancer risk in women, and is concentrated in cigarettes.

Higher levels
High blood cadmium may mean exposure from tobacco smoke, contaminated food, or industrial work such as battery making, metal plating or welding. Cadmium can build up in the kidneys and liver over many years, and long-term buildup can damage the kidneys and bones. The body can absorb more cadmium from food when iron stores run low, which can matter for women with heavy periods. Bone loss after menopause can add to the concern, since cadmium can make bones more fragile. Many people may have no symptoms early on, and kidney tests or a urine cadmium test can help track buildup.

Lower levels
Low blood cadmium may be the baseline you want, since the body has no known use for this metal. It may fit with little recent exposure to tobacco smoke or industrial sources. Blood can't fully describe what's already stored in the kidneys, though, and a urine test can give a better sense of long-term buildup. Secondhand smoke and foods such as shellfish and organ meats can still add small amounts over time. A low result may not need any follow-up on its own, especially in someone who has not smoked.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Cadmium →

These notes provide context and do not diagnose a condition.

Toxic heavy metal that crosses the placenta and is stored in bone.

Why it matters
Lead can be mobilized from bones during pregnancy and lactation, exposing the fetus and infant — screening matters before and during pregnancy.

Higher levels
High blood lead may mean recent or ongoing exposure from old paint and dust, soil, some imported spices, cosmetics or pottery, or work with lead. Even at low levels, lead can harm thinking and memory, especially in children, and it can raise blood pressure and damage the kidneys. Lead stored in bone can return to the blood during pregnancy and breastfeeding, and it can reach a baby and affect brain development. Some people may notice headaches, belly pain, constipation, tiredness or mood changes, and others may have no symptoms. Because this sample comes from a vein, it can be used to recheck a high finger-stick result.

Lower levels
Low blood lead may be the desired baseline, since the body has no use for lead. It may mean little recent exposure, though it can't tell the whole story, because lead can stay in your bones for years. Past exposure from old paint, dust or a job may not appear in a blood test. That can matter in pregnancy and breastfeeding, when stored lead can move back into the blood. Repeat testing can help when your home, work or hobbies involve lead.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Lead →

These notes provide context and do not diagnose a condition.

Toxic metal from fish consumption and dental amalgams; methylmercury crosses the placenta.

Why it matters
FDA limits fish intake in pregnancy due to fetal neurodevelopment risk; testing is informative for women planning pregnancy.

Higher levels
High blood mercury may mean recent exposure, most of it from eating large predatory fish such as tuna and swordfish. Dental amalgams and industrial sources can add to it, and some imported skin-lightening creams can contain mercury. Fish meals in the weeks before the test can raise the result. Mercury can cross the placenta and pass into breast milk, and it can affect how a baby's brain and nerves develop. Some people may notice numbness or tingling, shaky hands, trouble sleeping, or memory and mood changes, while others may have no symptoms.

Lower levels
Low blood mercury may be the baseline you want, and it can fit with eating little of the larger, higher-mercury fish. The body has no use for mercury, so a low value may not be a concern. Blood can pick up the form found in fish better than mercury vapor or some workplace forms, so a urine test may be used if those exposures are a question. A low result can also miss older exposure, because mercury can clear from the blood over weeks to months.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Mercury →

These notes provide context and do not diagnose a condition.

Identifies ABO blood type (A, B, AB, or O).

Why it matters
Essential prenatally for ABO-incompatibility risk in newborns and to prepare for any transfusion need during delivery.

Higher levels
ABO blood type can't be high or low, because the result is a category (A, B, AB or O) and not an amount. Your group can matter for matching blood if you ever need a transfusion. In pregnancy, a clinician may look at it along with Rh type and an antibody screen. If you're type O and your baby is A or B, your baby may be more prone to newborn jaundice (ABO incompatibility), a yellowing of the skin that can be mild. A meal, exercise or a passing illness can't change your blood type.

Lower levels
There's no such thing as a low ABO result, because blood type can't be measured on a scale like most lab values. The report can only name one of four groups: A, B, AB or O. The plus or minus you may see after your blood type is your Rh type, and that can come from a separate test. No group can be called better or worse on this test, and each one can be perfectly healthy. If you're pregnant or may need a transfusion, your clinician can explain what your group may mean for your care.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Blood type (ABO) →

These notes provide context and do not diagnose a condition.

Muscle enzyme used to evaluate inflammatory muscle disease like polymyositis and dermatomyositis.

Why it matters
Dermatomyositis is more common in women and can present with muscle weakness, rash, and elevated cancer risk.

Higher levels
High aldolase may reflect skeletal muscle damage from polymyositis, dermatomyositis, muscular dystrophy or rhabdomyolysis, a severe breakdown of muscle. Dermatomyositis and polymyositis can be more common in women, and dermatomyositis can also cause a purple or red rash on the eyelids or knuckles. Hard exercise can raise aldolase too, and so can liver injury, so a recent tough workout may sway your result. You may notice muscle weakness or aches, and a clinician may read this test with creatine kinase (CK) and other muscle enzymes.

Lower levels
Low aldolase may not be clinically meaningful. This enzyme can stay at small amounts in the blood when muscles are healthy, and it can leak out in larger amounts when muscle cells are inflamed or hurt. A low or normal result can't rule out a muscle condition by itself, since aldolase may stay in range in some people with muscle inflammation. For muscle aches or weakness, a clinician may look at CK and other muscle tests as well.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Aldolase →

These notes provide context and do not diagnose a condition.

Screens for red blood cell antibodies that can cause transfusion reactions or hemolytic disease of the newborn.

Why it matters
Critical in pregnancy — Rh and other antibodies can attack the fetus's red cells (e.g., Rh disease) requiring monitoring or RhoGAM.

Higher levels
A positive antibody screen may mean unexpected antibodies against red blood cells are present, which can matter for transfusion safety and pregnancy care. These antibodies can form after an earlier pregnancy, a miscarriage or a blood transfusion. In pregnancy, some can cross to the baby and attack the baby's red cells (hemolytic disease of the fetus and newborn), so extra monitoring may be needed. A recent Rh immune globulin (RhoGAM) shot can also turn this screen positive for a while. The lab can then identify the antibody and measure it, and you may feel nothing at all.

Lower levels
A negative antibody screen may mean no clinically significant red blood cell antibodies are present in this sample. It can't promise none will form later, since a new pregnancy or transfusion can trigger them. Levels can also sit too low for the screen to pick up. That's why a clinician may repeat this test later in pregnancy, especially if your blood type is Rh negative, or before a transfusion. A negative screen can be reassuring when you're planning for a birth or surgery.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Red blood cell antibody screen →

These notes provide context and do not diagnose a condition.

Enzyme released from damaged muscle; evaluates muscle injury, statin myopathy, and inflammatory myopathies.

Why it matters
Helpful in evaluating muscle pain in women on statins (often dose-sensitive due to smaller body size) and autoimmune myositis.

Higher levels
High creatine kinase (CK) may point to muscle injury. It can happen with heavy exercise, muscle problems from statins (statin myopathy), severe muscle breakdown (rhabdomyolysis), polymyositis or a heart attack, which a clinician may look into with CK-MB, the heart form of the enzyme. CK can stay higher for a few days after a hard workout, and a muscle injection or a fall can raise it too. An underactive thyroid can also push it up, and autoimmune muscle conditions can be more common in women. Muscle pain, weakness or dark urine can come with a high level.

Lower levels
Low CK may be harmless, and it can be seen with low muscle mass or steroid use. Women can have lower CK than men because they tend to have less muscle, so results may be compared with ranges for women. Being less active or losing muscle with age can also bring it down. A low level may not cause symptoms by itself, and it can't tell a clinician much about muscle health without other findings.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Creatine kinase (CK) →

These notes provide context and do not diagnose a condition.

Hormone that stimulates stomach acid; can be elevated in Zollinger-Ellison syndrome and on acid-suppressing medications.

Why it matters
Long-term PPI use is more common in women and can raise gastrin — relevant when evaluating chronic reflux or B12 absorption.

Higher levels
High gastrin, especially a markedly high level, can point to Zollinger-Ellison syndrome, a rare condition where a growth (gastrinoma) can make too much gastrin, or to atrophic gastritis, pernicious anemia or proton pump inhibitor (PPI) use. Pernicious anemia can make it hard to absorb vitamin B12, and it can be more frequent with autoimmune thyroid disease, which can be common in women. A recent meal or a Helicobacter pylori stomach infection can raise gastrin too. Heartburn, ulcers or diarrhea can happen, while low B12 can bring tiredness or numbness.

Lower levels
Low gastrin can be uncommon, and it may not call for any action. Surgery that removes the lower part of the stomach can lower it, since that's where most gastrin can be made. A stomach making plenty of acid can slow gastrin release, so a low reading may simply fit this normal feedback. A fasting sample can also read lower than one taken after a meal. A low level may not cause symptoms by itself, and a clinician may look into it only alongside other stomach findings.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Gastrin →

These notes provide context and do not diagnose a condition.

Screens for sickle hemoglobin (HbS).

Why it matters
Standard preconception/prenatal test for women with African, Mediterranean, or Middle Eastern ancestry to assess carrier status.

Higher levels
A positive sickle cell screen may mean sickle hemoglobin (HbS) is present, as in sickle cell trait or sickle cell disease. The screen can’t tell those two apart, so hemoglobin electrophoresis may be needed as a follow-up. Trait alone may cause no health problems, but if both partners carry the gene, a child can be born with sickle cell disease, which is why this can matter before or during pregnancy. People with sickle cell disease may get pain episodes, tiredness or anemia. Rarely, a false positive can happen, which is another reason a second test can help.

Lower levels
A negative sickle cell screen may point away from sickle cell trait or disease, but it can’t rule them out on its own. A recent blood transfusion, severe anemia or testing a baby in the first months of life can make a false negative possible. The screen can’t look for other inherited blood conditions, such as thalassemia, so a clinician may suggest a broader test before or during pregnancy. A negative result may bring no symptoms to watch for, and your family history can still be worth sharing.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Sickle cell screen →

These notes provide context and do not diagnose a condition.

The absolute number of immature (band) neutrophils in your blood, which can be an early sign the body is mobilizing to fight an infection.

Higher levels
A high absolute band count may point to an active bacterial infection or significant inflammation. Bands are young neutrophils, and the bone marrow can release them early when the body needs more infection fighters, a pattern called a left shift. It can happen with pneumonia, a kidney infection or a serious illness anywhere in the body. White cell counts can also rise naturally in pregnancy and right after giving birth. Some people may notice fever, chills or feeling very unwell, though the number alone can't say where an infection is.

Lower levels
A low absolute band count can be normal, and it may not be a concern. Healthy blood may hold very few of these young neutrophils, because most can stay in the bone marrow until they mature. A low count may simply fit a body that isn't fighting a major infection right now, though it can't rule one out, especially early on. Labs can also differ in how they tell bands from mature neutrophils, so a clinician may look at your total white blood cell count too.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Absolute Band Neutrophils →

These notes provide context and do not diagnose a condition.

The absolute number of basophils, white cells that drive histamine release in allergic and inflammatory responses.

Higher levels
A high absolute basophil count (basophilia) may point to allergies or long-lasting inflammation and, less frequently, to a myeloproliferative disorder, where the bone marrow can make too many blood cells. It can happen with inflammatory bowel disease, rheumatoid arthritis or an underactive thyroid (hypothyroidism). Because basophils are so few, a small change can look large on paper, and a clinician may repeat the count before reading much into it. Some people may notice itching, hives or a runny nose from allergies, and others may have no symptoms.

Lower levels
A low absolute basophil count can be common and is rarely meaningful on its own. These are the rarest white blood cells, so a healthy count can sit close to zero. A brief dip may follow a sudden infection, stress, steroid medicines or an overactive thyroid (hyperthyroidism). A low count may not cause symptoms by itself, and a clinician may pay more attention to the rest of your white cells.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Absolute Basophils →

These notes provide context and do not diagnose a condition.

The absolute number of blasts (immature precursor cells) in blood, normally zero since these cells belong in the marrow.

Higher levels
A high or measurable absolute blast count may be abnormal and can point to leukemia or another bone marrow disorder that may need urgent evaluation. Blasts are very young blood cells that belong in the marrow, so finding them in the blood may mean the marrow isn't working normally. Less frequently, a few can appear while the marrow recovers from severe infection or chemotherapy, or after growth-factor medicines. Some people may notice tiredness, fevers, easy bruising or bleeding, and others may feel fine. This count can't give an answer on its own, so a clinician may order a blood smear and more testing.

Lower levels
A low absolute blast count, or zero, may be the normal result, because these very young cells can stay inside the bone marrow until they mature. This is the result a clinician may expect to see. It can't rule out every blood or marrow condition, since some can appear in other parts of the blood count first. With unusual bruising, ongoing fevers or deep tiredness, your red cells, platelets and other white cells can give a fuller picture.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Absolute Blasts →

These notes provide context and do not diagnose a condition.

The absolute number of eosinophils, white cells involved in allergic responses and parasite defense.

Higher levels
A high absolute eosinophil count (eosinophilia) may suggest allergies, asthma, a parasitic infection or a reaction to a medicine. Eczema and hay fever can raise it too. Asthma can be more common in adult women than in men, and symptoms can change with your period or during pregnancy. Steroid medicines can lower this count and may hide a high result, and levels can shift with the time of day. You may notice wheezing, sneezing, itchy skin or a rash, or you may feel nothing at all.

Lower levels
A low absolute eosinophil count can be normal, and many labs may not treat it as a problem. It can reflect stress on the body, such as a sudden illness or surgery, or the effect of steroid medicines like prednisone. Cortisol, the body's own stress hormone, can push eosinophils down, so the count may dip with high cortisol, as in Cushing syndrome, a condition that can be more common in women. Healthy people can have very few of these cells, and a single low number may not cause any symptoms.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Absolute Eosinophils →

These notes provide context and do not diagnose a condition.

The absolute number of lymphocytes, the white cells central to fighting viruses and building long-term immunity.

Higher levels
A high absolute lymphocyte count (lymphocytosis) may reflect a viral infection such as mono or, less frequently, a lymphoproliferative disorder, where the body can make too many lymphocytes, such as chronic lymphocytic leukemia. Whooping cough, smoking, stress on the body and having your spleen removed can raise it too. A short rise during or after a cold or flu can be common and may settle as you recover. Swollen glands, a sore throat or tiredness can come with it, or there may be no symptoms.

Lower levels
A low absolute lymphocyte count (lymphopenia) can result from a sudden illness, steroid medicines or immune suppression, and it can raise your risk of infection. Autoimmune conditions can lower it as well, and lupus, which mostly affects women, may be one example. Cancer treatment, HIV and poor nutrition can also play a part. A short dip during a cold or flu can be common and may pass. Repeat infections can be a clue, while some people may feel fine.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Absolute Lymphocytes →

These notes provide context and do not diagnose a condition.

The absolute number of metamyelocytes (immature neutrophil precursors), normally zero in circulating blood.

Higher levels
A high or measurable metamyelocyte count may mean your bone marrow is releasing young white blood cells early, in response to a severe infection or because of a marrow disorder. Major inflammation, injury or growth-factor medicines can also push them into the blood. In pregnancy and right after giving birth, a few of these young cells can show up and may be expected. Any symptoms can depend on the reason, such as fever with an infection. Your clinician may read this result alongside your neutrophils and total white cell count.

Lower levels
A low or zero metamyelocyte count can be normal for women and men alike. Metamyelocytes are a late stage in a neutrophil's growth, one step before bands, and healthy blood may hold few or none because they can finish maturing in the bone marrow. A zero result can't tell you how many mature neutrophils are in your blood, so your absolute neutrophil count may say more about your infection defenses. This result may not need any follow-up by itself.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Absolute Metamyelocytes →

These notes provide context and do not diagnose a condition.

The absolute number of monocytes, white cells that engulf pathogens and support immune cleanup and repair.

Higher levels
A high absolute monocyte count (monocytosis) may suggest a long-lasting infection or inflammation or, less frequently, a blood disorder such as chronic myelomonocytic leukemia. It can happen with tuberculosis, inflammatory bowel disease or autoimmune conditions like lupus and rheumatoid arthritis, which can be more common in women. The count can also bounce up as the body recovers from an infection or from a low white cell count. Some people may notice lingering fevers or tiredness, and others may feel well.

Lower levels
A low absolute monocyte count (monocytopenia) can go along with steroid use or with bone marrow suppression, as can happen during chemotherapy. A short dip after a steroid dose can be harmless, and it may matter less if the rest of your blood count looks normal. Less frequently, it can be part of a broader marrow condition, such as aplastic anemia, when other blood cells are low too. A low count may cause no symptoms by itself, though some people may get more infections if other white cells are also down.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Absolute Monocytes →

These notes provide context and do not diagnose a condition.

The absolute number of myelocytes (immature granulocyte precursors), normally zero in blood.

Higher levels
A high or measurable myelocyte count may mean your bone marrow is sending out young white cells before they're ready, as can happen with a severe infection or a marrow disease such as chronic myeloid leukemia. During pregnancy, a few of these cells can show up, and that can be normal. Heavy strain on the body, such as major surgery, burns or serious injury, can also bring them into the blood. A fever or feeling very ill can come with an infection. A clinician may look at your total white count and a blood smear to sort out why.

Lower levels
A low or zero myelocyte count can be the normal result. Myelocytes are young white cells that can stay in the bone marrow while they grow, so none may appear on a routine blood count. That's true for women and men alike, and a zero here may not call for any follow-up. This line can't speak to your immune health by itself, and your other white cell counts can fill in that picture.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Absolute Myelocytes →

These notes provide context and do not diagnose a condition.

The absolute number of neutrophils, the key value (the ANC) for gauging the body's ability to fight bacterial infection.

Higher levels
A high absolute neutrophil count (neutrophilia) may point to an infection, inflammation or physical stress on the body. It can happen with bacterial infections, injuries, surgery, smoking, hard exercise or steroid medicines and, less frequently, with a bone marrow disorder. Neutrophil levels can naturally rise during pregnancy, so a higher count may be expected then. Even a stressful moment can nudge this number up for a short time. Fever or pain can come from the underlying problem, and you may also feel completely well.

Lower levels
A low absolute neutrophil count (neutropenia) can raise your risk of infection, and it can result from a viral illness, medicines or bone marrow problems. In women, autoimmune conditions such as lupus can lower it too. Some healthy people, including some of African or Middle Eastern ancestry, can have a lifelong lower count that may not cause problems. You may feel nothing from the low count itself, though mouth sores or repeat infections can appear. A fever with a low count may need prompt medical care.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Absolute Neutrophils →

These notes provide context and do not diagnose a condition.

The absolute number of immature, nucleated red blood cells in circulation, normally absent in adults.

Higher levels
A high or measurable nucleated red blood cell count may point to bone marrow stress from severe anemia, low oxygen or marrow infiltration, when abnormal cells crowd the marrow. Adults may have none in their blood, so any found can prompt a closer look. It can happen with a large blood loss, serious illness, fast red cell breakdown (hemolysis) or inherited conditions like thalassemia and sickle cell disease. Anemia can be common in women, but these cells may appear only when it's severe. Symptoms can include deep tiredness, shortness of breath or pale skin.

Lower levels
A low or zero nucleated red blood cell count can be the normal adult result, because red cells can push out their nucleus before they leave the bone marrow. Newborns can have some in their blood for a short time, but adults may have none. This may be the same for women and men. A zero here can't rule out anemia, so your hemoglobin, hematocrit and iron tests may say more about that.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Absolute Nucleated Rbc →

These notes provide context and do not diagnose a condition.

The absolute number of promyelocytes (early granulocyte precursors), normally zero in blood.

Higher levels
A high or measurable promyelocyte count can be a sign of severe bone marrow stress or leukemia, and it may need prompt review. These very early white cells can stay in the marrow, so finding them in the blood may mean the marrow is under heavy strain or isn't making blood cells normally. A severe infection or recovery after chemotherapy can also release a few. One rare form, acute promyelocytic leukemia, can cause serious bleeding and may need urgent care. Warning signs can include easy bruising, bleeding gums, unusually heavy periods, fevers or tiredness.

Lower levels
A low or zero promyelocyte count may be what a clinician expects, since none may appear in healthy blood. Promyelocytes are a very early stage of white blood cell, and they can stay deep in the bone marrow until they grow. The same can be true for women and men. This result can't check everything about your marrow, so your hemoglobin, platelets and other white cells can add to the picture.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Absolute Promyelocytes →

These notes provide context and do not diagnose a condition.

The ratio of albumin to all other blood proteins (globulins); helps interpret total protein and flag liver, kidney, or immune disorders.

Higher levels
A high albumin/globulin (A/G) ratio may reflect low globulins, which can be seen in some immune deficiencies or genetic conditions. Because globulins include the antibodies that fight infection, some people with low levels may get infections more easily, while others may notice nothing. A mildly high ratio may mean little when your total protein looks normal. Medicines that calm the immune system can lower globulins as well. If the ratio stays high, a clinician may look at your globulin result or check antibody (immunoglobulin) levels.

Lower levels
A low albumin/globulin (A/G) ratio may point to low albumin, as can happen with liver disease or malnutrition, or to high globulins, as can happen with long-lasting inflammation, infection or a disorder like multiple myeloma. Lupus and other autoimmune conditions can raise globulins, and they can be much more common in women. Pregnancy can naturally lower albumin, which can shift this ratio too. Tiredness or swelling can appear, or you may feel fine. The ratio can't name a reason on its own, so it may be read with your other protein results.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Albumin/Globulin Ratio →

These notes provide context and do not diagnose a condition.

The percentage of young, immature neutrophils (bands) among your white cells; a rise (a 'left shift') may mean the marrow is rushing out cells to fight infection.

Higher levels
A high band percentage (a left shift) may suggest a sudden bacterial infection or inflammation, as the bone marrow can release young neutrophils early. A kidney infection can raise it, while a simple bladder infection may not change it, and women can get urinary tract infections far more frequently than men. Because this is a share of all white cells, the number can move when other cell types change. Fever or chills can come along with it. Your clinician may also look at your absolute band count and total white count to see the full size of the response.

Lower levels
Low or absent bands can be normal and may not be a worry. This percentage can sit near the bottom of the range when your body isn't rushing out young neutrophils, and the expected range can be the same for women and men. A low share can't rule out an infection by itself, especially one that's mild or just starting. Band counts can also vary a little from one lab reader to the next, so small differences between tests may not matter.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Band Neutrophils →

These notes provide context and do not diagnose a condition.

The percentage of blasts, very immature precursor cells that should stay in the bone marrow; their appearance in blood may need prompt attention.

Higher levels
Any blasts in the blood may be abnormal and can point to a serious bone marrow disorder such as leukemia, so prompt review by a blood specialist (hematologist) may be needed. This percentage can come from a hand count on a blood smear, where a lab specialist can look at each cell. The share of blasts can help a clinician decide what further testing, such as a bone marrow exam, may be needed. Less frequently, a few can appear with marrow recovery after chemotherapy or severe infection. Easy bruising, fevers, bleeding or tiredness can come along with it.

Lower levels
Low or zero blasts may be the normal, expected result for women and men alike. Blasts are the earliest blood cells, and they can stay in the bone marrow, where they can grow into red cells, white cells or platelets. This line alone may not need any follow-up, and it can stay at zero through normal life changes such as pregnancy. It can't rule out a marrow problem by itself, though, so the rest of your blood count can still matter.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Blasts →

These notes provide context and do not diagnose a condition.

The ratio of two kidney waste products; can help tell whether a rise in kidney markers comes from dehydration versus kidney damage.

Higher levels
A high BUN/creatinine ratio may point to dehydration or reduced blood flow to the kidneys, or to bleeding in the digestive (GI) tract. Not drinking enough, vomiting or diarrhea can push it up, and so can a high-protein diet or steroid medicines. Severe vomiting in pregnancy can leave you low on fluids and raise the ratio. A small frame with little muscle can also lower creatinine and lift the ratio without any problem. Thirst, dizziness and dark urine can go with fluid loss, and black stools may go with bleeding.

Lower levels
A low BUN/creatinine ratio can reflect liver disease, low protein intake or overhydration. During pregnancy your kidneys can filter more blood, so both waste products can run lower and the balance can shift. Some kidney injuries can lower the ratio as well. This number can be most useful when BUN or creatinine is out of range, so a low ratio may mean little when both are normal. A clinician may look at your diet, fluids and other kidney tests to make sense of it.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Bun/Creatinine Ratio →

These notes provide context and do not diagnose a condition.

All blood proteins other than albumin, including antibodies and transport proteins; can reflect immune activity and inflammation.

Higher levels
High globulins can occur with long-lasting infection or inflammation, autoimmune disease or blood disorders such as multiple myeloma. Autoimmune conditions can be much more common in women, and some, such as lupus, can raise globulin levels. Long-term liver disease can raise them too. Because this number can be worked out from total protein minus albumin, dehydration may sway it. Tiredness can happen, or there may be no symptoms, so a clinician may order a protein test (serum protein electrophoresis) to see which globulins are high.

Lower levels
Low globulins can point to an immune deficiency or protein loss through the kidneys or gut. Because this group includes antibodies, some people may get more infections than expected. Steroids and other medicines that calm the immune system can lower them too. When protein is being lost, swelling in the legs or belly can appear. A clinician may check antibody (immunoglobulin) levels or a urine protein test to find out why.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Globulin →

These notes provide context and do not diagnose a condition.

The percentage of metamyelocytes, immature neutrophil precursors not normally seen in blood; their appearance may point to marrow stress.

Higher levels
High metamyelocytes may mean your bone marrow is releasing young white blood cells early, a pattern called a left shift. This can happen with a severe infection (including sepsis), inflammation or a marrow disorder. Growth-factor medicines that boost white cells can also bring them into the blood. During pregnancy a few can show up, which can be normal. Any symptoms may come from the underlying reason, such as fever or chills with an infection, and a clinician may look at your total white count and a blood smear.

Lower levels
Low or absent metamyelocytes may simply mean these nearly grown white cells are staying in your bone marrow, and this can be the normal result for women and men. Healthy adults can have none in the blood at all, so a zero may not be a concern. This result can’t show how well your marrow is working on its own, because the rest of your white cell count can say more about that. It may come with no symptoms, and it can stay the same from one blood test to the next.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

These notes provide context and do not diagnose a condition.

The percentage of myelocytes, immature granulocyte precursors normally confined to the marrow.

Higher levels
High myelocytes may mean a marked left shift, when the bone marrow pushes very young white cells into the blood before they’re ready. It can happen with severe infection, inflammation or a marrow disorder, such as chronic myeloid leukemia. Growth-factor medicines or major blood loss can put the marrow under the same kind of pressure. A few of these cells can appear during pregnancy, and that can be harmless. Fever, tiredness or unusual bruising may offer a clue to the reason, so a clinician may ask about symptoms and review a blood smear.

Lower levels
Low or absent myelocytes may be exactly what’s expected, since these young cells can remain in the bone marrow until they mature. Zero can be the normal result, and the range may be the same for women and men. This number can’t tell you much alone about your immune health, because your neutrophil count and total white count may give a fuller view. No symptoms may go with it, and a zero by itself may need no follow-up.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

These notes provide context and do not diagnose a condition.

Immature red blood cells that still contain a nucleus, expressed per 100 white cells; rarely seen in healthy adults.

Higher levels
High nucleated red blood cells (NRBCs) may mean your bone marrow is under stress and sending out red cells before they’re ready. It can happen with severe anemia, low oxygen levels or a marrow disorder. A large blood loss, including after childbirth, or a serious illness can also bring them out, and red cell breakdown (hemolysis) can do the same. Mild anemia from low iron, which is common in women, may not bring these cells into the blood. Symptoms can include tiredness, shortness of breath or pale skin, and they can depend on the reason.

Lower levels
Low or zero nucleated red cells may be the normal result for adults, women and men alike, because these young cells can stay in the bone marrow until they lose their nucleus. Newborns can have some in their blood, so this result can read differently at that age. A zero can’t rule out anemia, since hemoglobin and your red cell count can tell you more about that. This result may come with no symptoms and may not need any further look on its own.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

These notes provide context and do not diagnose a condition.

The percentage of promyelocytes, early granulocyte precursors that belong in the marrow, not the bloodstream.

Higher levels
High promyelocytes may mean very early white cells have left your bone marrow, which can be a sign of a significant left shift or a marrow disorder such as acute promyelocytic leukemia. Severe infection or a marrow recovering from chemotherapy can also release them, as can growth-factor medicines. Finding any can be uncommon, and the result can’t name the reason on its own. Fever, tiredness, easy bruising or unusual bleeding can occur, and any of these can deserve prompt attention. A clinician may want to review a blood smear and your full blood count soon.

Lower levels
Low or absent promyelocytes may be the expected result, because these very early cells can stay in your bone marrow, not your bloodstream. None may be found in healthy women and men, so a zero may not be a concern. This value can’t measure overall marrow health by itself, and the other parts of your blood count can add to the picture. It may not cause symptoms, and it may need no action when the rest of your blood count looks normal.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

These notes provide context and do not diagnose a condition.

The percentage of reactive (atypical) lymphocytes, normal lymphocytes that look enlarged while responding to infection.

Higher levels
High reactive lymphocytes may mean your immune system is responding to a viral infection, classically mononucleosis (mono) from Epstein-Barr virus (EBV). Other viruses, such as cytomegalovirus (CMV) or hepatitis, can do this too, and some medicines can as well. In pregnancy, a mono-like illness can be worth mentioning to your clinician, because some of the germs behind one can pass to the baby. A sore throat, fever, swollen glands or deep tiredness may go along with it. These cells can fade within weeks as you recover, so a later count may look different.

Lower levels
Low or no reactive lymphocytes may be the normal state, and few or none can be the expected result in a healthy person. The range may be the same for women and men. These cells can fade within weeks of an illness, so a low count can’t rule out a recent viral infection. A low result may come with no symptoms. If you feel unwell, a clinician may turn to a specific test, such as one for mono.

How to prepare
Fasting and Timed draw tags mark many markers that need it. A marker with no tag can still need preparation, so contact us before your draw if you’re not sure.

More about Reactive Lymphocytes →

These notes provide context and do not diagnose a condition.