The pituitary glycoprotein hormone family includes follicle-stimulating hormone (FSH), luteinizing hormone (LH), human chorionic gonadotropin (hCG), and thyroid-stimulating hormone (TSH). All of these glycoproteins consist of an identical alpha subunit and a hormone-specific beta subunit. FSH beta is the beta subunit of follicle-stimulating hormone. In conjunction with luteinizing hormone, follicle-stimulating hormone induces egg and sperm production. The FSH antibody specifically labels gonadotrophs in pituitary. It may be useful in the classification of pituitary tumors.