title: Clarification of efficacy!
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Friedman
mesh_terms: D003276:Contraceptives, Oral; D004338:Drug Combinations; D004997:Ethinyl Estradiol; D005260:Female; D006801:Humans; D009644:Norgestrel / Q000031:analogs & derivatives*; D011247:Pregnancy
chemical_list: D003276:Contraceptives, Oral; D004338:Drug Combinations; C109079:norgestimate, ethinyl estradiol drug combination; D009644:Norgestrel; D004997:Ethinyl Estradiol