
What is it?
This test measures the amount of follicle-stimulating hormone (FSH) in a blood sample. This hormone is made by the pituitary gland.
- In women, FSH helps control the menstrual cycle and the production of eggs by the ovaries.
- In men, FSH helps control the production of sperm.
Why is this test done?
The amounts of FSH and other hormones are measured to:
- Find out why a couple can't become pregnant.
- Help diagnose menstrual problems or find out whether a woman has gone through menopause.
- See why a child is going through early or delayed puberty.
- Help diagnose certain pituitary gland problems, such as a tumor.
How do you prepare for the test?
Up to 4 weeks before the test, you may be asked to stop taking birth control pills or other medicines that contain estrogen or progesterone.
What happens during the test?
A health professional uses a needle to take a blood sample, usually from an arm.
For a woman who is having problems with her menstrual cycle or who cannot become pregnant, more than one blood sample may be needed to help identify a follicle-stimulating hormone (FSH) problem. A sample may be taken each day for several days in a row.
What happens after the test?
- You will probably be able to go home right away, depending on the reason for the test.
- You can go back to your usual activities right away.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor if you are having problems. It's also a good idea to keep a list of the medicines you take. Ask your doctor when you can expect to have your test results.
Where can you learn more?
Go to https://www.healthwise.net/patientEd
Enter T983 in the search box to learn more about "Follicle-Stimulating Hormone (FSH): About This Test".
Current as of: September 8, 2022
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & Kathleen Romito MD - Family Medicine