Follicle Stimulating Hormone (FSH)
The Follicle Stimulating Hormone (FSH) test measures the amount of FSH, a sex hormone produced by the pituitary gland, in your blood. In women, Follicle Stimulating Hormone (FSH) stimulates production of eggs and a hormone called estradiol during the first half of the menstrual cycle. In men, Follicle Stimulating Hormone (FSH) stimulates production of sperm.