This test measures the level of follicle-stimulating hormone (FSH ) in your blood. FSH affects sexual development in children and fertility in adults. Learn more. Understanding the Full Form of FSH FSH , also known as Follicle-Stimulating Hormone, is a hormone that plays a crucial role in the functioning of the human reproductive system. It is primarily responsible for the development and maturation of follicles in the ovaries of females and the production of sperm in males. FSH Full Form Follicle stimulating hormone ( FSH ) is a protein produced by the pituitary gland. It stimulates the development of ovarian follicles and regulates the menstrual cycle. FSH full form is follicle-stimulating hormone. Know about how the FSH test is conducted, when it should be conducted, normal level according to gender, and much more.