Follicle-Stimulating Hormone
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Test Overview
A follicle-stimulating hormone test measures the amount of follicle-stimulating hormone (FSH) in a blood sample. FSH is produced by the pituitary gland.
- In women, FSH helps control the menstrual cycle and the production of eggs by the ovaries. The amount of FSH varies throughout a woman's menstrual cycle and is highest just before she releases an egg (ovulates).
- In men, FSH helps control the production of sperm. The amount of FSH in men normally remains constant.
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 cannot become pregnant (infertility). The FSH level can help determine whether male or female sex organs (testicles or ovaries) are functioning properly.
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| Last updated: | June 06, 2007 |
|---|---|
| Author: | Maria G. Essig, MS, ELS |
| Reviewed By: | Patrice Burgess, MD - Family Medicine, Kirtly Jones, MD - Obstetrics and Gynecology |
| Editors: | Susan Van Houten, RN, BSN, MBA, Tracy Landauer |
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