chorionic gonadotrophin
/ˌkɔːrɪˈɒnɪk/noun
mass noun
- a hormone secreted during pregnancy by the placenta which stimulates continued production of progesterone by the ovaries. Injection of human chorionic gonadotrophin (HCG) is used to treat some disorders of the reproductive system.绒（毛）膜促性腺激素。