$4.00
Priced per marker, with baseline labs included. You’ll see your total before you pay.
Hormones & reproductive
FSH test
Follicle-stimulating hormone. Pituitary hormone that drives ovarian follicle growth; can rise with ovarian decline.
At a glance
In about 5 days
Most results are ready in about 5 days. Some specialty markers can take up to 21 days.
Best at a set time of day or cycle day
Contact us before your draw if you’re not sure.
Walk in at Quest
Your lab order arrives by email. Most Quest locations take walk-ins, so bring it with a photo ID.
What it measures
FSH comes from your pituitary gland, a small gland at the base of your brain, and helps eggs grow in your ovaries each cycle. As your ovaries slow down, FSH can rise.
Why it matters for women
FSH can help explain irregular or missing periods and trouble getting pregnant. It can rise as your ovaries wind down toward menopause, but in perimenopause it can swing from month to month, so one result may not settle the question. Hormonal birth control and pregnancy can lower it.
You might check it if…
- your periods have become irregular or stopped
- you’re trying to get pregnant
- you’re getting hot flashes or other signs of perimenopause
- early menopause runs in your family
What your result may mean
High FSH: what it may mean
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.
Low FSH: what it may mean
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.
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These notes provide context and do not diagnose a condition. Not yet available in NY, NJ, RI, HI, ND, SD or WV.