DefinitionFSH stands for follicle-stimulating hormone (FSH). This hormone is released by the anterior pituitary gland.In women, FSH stimulates production of eggs and a hormone called estradiol during the first half of the menstrual cycle.In men, FSH stimulates production of sperm.This article discusses the test to check the level of FSH in the blood.Alternative NamesFollicle stimulating hormoneHow the test is performedBlood is drawn from a vein, usually from the inside of the elbow or the back of the hand. The site is cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.Next, the health care provider gently inserts a needle into the vein. The blood collects into