a 22-year-old man with hypogonadism , leydig cell hypoplasia , high plasma lh , and normal plasma fsh was given human chorionic gonadotropin ( hcg ) and human luteinizing hormone ( hlh ) in order to assess testicular testosterone responses to exogenously administered gonadotropins .
C0020619
hypogonadism
C0018062
human chorionic gonadotropin