title: Dysmenorrhoea unrelieved by an oral contraceptive.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002986:Clinical Trials as Topic; D004412:Dysmenorrhea / Q000188:drug therapy*; D005260:Female; D006801:Humans; D008656:Mestranol / Q000627:therapeutic use*; D009640:Norethindrone / Q000627:therapeutic use*; D010919:Placebos
chemical_list: D010919:Placebos; D008656:Mestranol; D009640:Norethindrone