title: Conception control by vaginal administration of pills containing ethinyl estradiol and dl-norgestrel.
abstract: One hundred twenty-four women of reproductive age have used vaginal pills containing 50 micrograms dl-norgestrel and 35 micrograms ethinyl estradiol to prevent conception for periods ranging from 6 to 20 months. One thousand four hundred thirty-eight woman-months were recorded. No pregnancies occurred. Cycle control was good. Bleeding usually lasted 3 to 5 days, and the interval between withdrawal bleeding events was 26 to 30 days in 86% of the cycles. Amenorrhea, breakthrough bleeding, and spotting occurred rarely. The continuation rate at 1 year was 64%.
mesh_terms: D000293:Adolescent; D000328:Adult; D002986:Clinical Trials as Topic; D003271:Contraceptive Agents, Female / Q000008:administration & dosage* / Q000009:adverse effects; D004958:Estradiol / Q000008:administration & dosage* / Q000009:adverse effects; D005260:Female; D006801:Humans; D008598:Menstruation / Q000187:drug effects; D009644:Norgestrel / Q000008:administration & dosage* / Q000009:adverse effects; D013607:Tablets; D014621:Vagina
chemical_list: D003271:Contraceptive Agents, Female; D013607:Tablets; D009644:Norgestrel; D004958:Estradiol