Follicle stimulating hormone is produced by the pituitary gland. It regulates the functions of both the ovaries and testes. Follicle stimulating hormone is one of the gonadotropic hormones, the other being a luteinising hormone. FSH enters the testes, stimulating the Sertoli cells, which help to nourish the sperm cells that the testes produce, to begin facilitating spermatogenesis. The Sertoli cell is a kind of sustentacular cell which serves as a “nurse” cell of the testes and which is part of a seminiferous tubule.