title: The reliability of pregnancy tests performed by trained and untrained persons.
mesh_terms: D006063:Chorionic Gonadotropin / Q000652:urine; D002983:Clinical Competence; D005260:Female; D006801:Humans; D011247:Pregnancy; D011259:Pregnancy Tests, Immunologic / Q000592:standards*
chemical_list: D006063:Chorionic Gonadotropin