Pituitary adenomas are tumors that occur in the pituitary gland. Sildenafil enhances electrically evoked oxytocin release from the pituitary gland. The hypothalamus leads on to the pituitary gland. Secretion is stimulated by thyroid-stimulating hormone, secreted by the anterior pituitary. Endorphins are produced in the pituitary gland. This is regulated partly through control of secretion of hormones from the pituitary gland. Secondary endocrine disease is indicative of a problem with the pituitary gland. It can also be caused by diseases affecting the hypothalamus and pituitary gland. Antigonadotropins are drugs that suppress the GnRH-mediated secretion of gonadotropins from the pituitary gland. This can be due to injury to the hypothalamus or pituitary gland or genetics. Gonadotropins are glycoprotein polypeptide hormones secreted by gonadotrope cells of the anterior pituitary of vertebrates. Control of FSH release from the pituitary gland is unknown. They are produced and stored in the pituitary gland. They are most effective in those whose pituitary tumours cosecrete prolactin. Hypopituitarism is characterized by a decreased secretion of hormones released by the anterior pituitary.