Pituitary gland or the master endocrine gland secretes various hormones controlling the functioning of other endocrine glands. Follicle stimulating hormone (gonadotrophic hormone) is a proteinaceous hormone secreted by gonadotrophs or gynandrotroph cells of anterior pituitary. It stimulates spermatogenesis in testis and maturation of Graafian/ovarian follicles in ovaries with secretion of oestrogen hormone in females. Prolactin/lactogenic or luteotrophic hormone (PRL, LTH) is a proteinaceous hormone secreted by lactotroph cells of anterior pituitary. It stimulates development of mammary glands (in pregnancy) and lactation (after delivery). It is also called as maternity hormone. Oxytocin (OT=pitocin) is a peptide hormone secreted by posterior hormone secreted by posterior pituitary. It functions in vasodilation and in stimulating uterine contraction during delivery. Hence, it is known as birth hormone. Its other function is initiating ejection of milk, so called as milk ejection hormone.