A double-blind comparison of two oral contraceptives containing 50 mu g. and 30 mu g. ethinyl estradiol.
D000328:Adult; D003258:Consumer Behavior; D003276:Contraceptives, Oral / Q000008:administration & dosage* / Q000009:adverse effects / Q000494:pharmacology; D004997:Ethinyl Estradiol / Q000008:administration & dosage* / Q000009:adverse effects / Q000494:pharmacology; D005260:Female; D006801:Humans; D008598:Menstruation / Q000187:drug effects; D008599:Menstruation Disturbances / Q000139:chemically induced; D009644:Norgestrel / Q000008:administration & dosage; D010919:Placebos; D013223:Statistics as Topic; D013997:Time Factors
D003276:Contraceptives, Oral; D010919:Placebos; D009644:Norgestrel; D004997:Ethinyl Estradiol