title: Norgestrel-ethinyl estradiol--an oral contraceptive. A clinical study of 725 patients.
mesh_terms: D002986:Clinical Trials as Topic; D003277:Contraceptives, Oral, Combined / Q000009:adverse effects / Q000592:standards*; D004997:Ethinyl Estradiol / Q000592:standards*; D005260:Female; D006801:Humans; D009644:Norgestrel / Q000592:standards*; D014626:Vaginal Smears
chemical_list: D003277:Contraceptives, Oral, Combined; D009644:Norgestrel; D004997:Ethinyl Estradiol