Follicle-Stimulating Hormone (FSH) Test

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.

FSH helps control the menstrual cycle and the production of eggs by the ovaries. FSH also helps control the production of sperm.

The amount of FSH varies throughout the menstrual cycle. It's highest just before the release of an egg (ovulation). The amount of FSH that controls sperm production normally stays at a constant level.

The FSH level can help find out if sex organs (testicles or ovaries) are working as they should.