title: Use of a radioimmunoassay specific for human chorionic gonadotropin in the diagnosis of early ectopic pregnancy.
mesh_terms: D006063:Chorionic Gonadotropin / Q000097:blood*; D005260:Female; D006801:Humans; D010535:Laparoscopy; D011247:Pregnancy; D011274:Pregnancy, Tubal / Q000175:diagnosis*; D011863:Radioimmunoassay; D013997:Time Factors
chemical_list: D006063:Chorionic Gonadotropin