title: A andomized contraceptive trial comparing a daily progestogen with a combined oral contraceptive steroid.
mesh_terms: D000293:Adolescent; D000328:Adult; D004338:Drug Combinations; D005040:Ethynodiol Diacetate / Q000009:adverse effects / Q000494:pharmacology*; D005260:Female; D006801:Humans; D008598:Menstruation / Q000187:drug effects; D008599:Menstruation Disturbances / Q000139:chemically induced; D008656:Mestranol / Q000009:adverse effects / Q000494:pharmacology*; D010060:Ovulation / Q000187:drug effects; D013997:Time Factors
chemical_list: D004338:Drug Combinations; D005040:Ethynodiol Diacetate; D008656:Mestranol