|a hormone secreted by the chorionic villi of the placenta in mammals, esp human chorionic gonadotrophin. It promotes the secretion of progesterone by the corpus luteum and its presence in the urine is an indication of pregnancy|
chorionic gonadotropin n.
A glycoprotein that is produced by the placenta and is excreted in the urine of pregnant women, and that acts to stimulate ovarian secretion of the estrogen and progesterone that are required to maintain the conceptus; it is used as an aid for conception and in the treatment of cryptorchidism. Also called anterior pituitary-like hormone, chorionic gonadotropic hormone, human chorionic gonadotropin.