hormones released by the pituitary gland that act on the gonads (ovaries in the female, testes in the male) to promote production of sex hormones and either eggs or sperm

substances stimulating the gonads that arises from the anterior pituitary or the placenta (chorionic).

glycoproteins released by the pituitary gland or the placenta. Gonadotrophins have various effects on the ovaries and testes, including an increase in the weight of the ovaries and the growth of Graafian follicles, which contain the eggs, and, in males, the release of testosterone from the testes.