for the most part , gonadotropin-primed rats were used at 6 days and were reinjected with saline or various doses of colchicine and vinblastine : after 3 h the animals were injected with human chorionic gonadotropin ( hcg , 10 iu ) or saline for an additional hour .
C0018061
gonadotropin
C0018062
human chorionic gonadotropin