human chorionic gonadotropin. the hormone that is secreted by the placenta early in pregnancy and which inhibits menstrual periods.
human chorionic gonadotropin, a hormone from the placenta during pregnancy which prolongs the life of the corpus luteum and hence progesterone production, thus preserving the pregnancy.
HUMAN CHORIONIC GONADOTROPIN. a substance produced by the placenta that maintains the corpus luteum causing it to produce progesterone during pregnancy