The amounts of FSH and other hormones (luteinizing hormone,
estrogen, and progesterone) are measured in both a man and a
woman to determine why the couple can't become pregnant
(infertility). The FSH level can help determine whether male or
female sex organs (testicles or ovaries) are functioning
properly. Why It Is Done A follicle-stimulating hormone (FSH)
test may be done to: How To Prepare Many medicines, such as
cimetidine, clomiphene, digitalis, and levodopa, can change your
test results. You may be asked to stop taking medicines
(including birth control pills) that contain estrogen or
progesterone or both for up to 4 weeks before having a follicle-
stimulating hormone (FSH) test. Make sure your doctor has a
complete list of all the prescription and over-the-counter
medicines you are taking, including herbs and natural
substances. Tell your doctor if you have had a test that used a
radioactive substance (tracer) within the last 7 days. Recent
tests using a radioactive tracer (such as a thyroid scan or bon