Contraceptive efficacy among married women aged 15-44 years.
D000293:Adolescent; D000328:Adult; D001741:Black or African American; D000367:Age Factors; D003267:Contraception / Q000379:methods; D003268:Contraception Behavior; D003430:Cross-Sectional Studies; D004522:Educational Status; D005260:Female; D006801:Humans; D008393:Marriage; D010298:Parity; D010352:Patient Dropouts; D011247:Pregnancy; D012071:Religion and Sex; D012111:Residence Characteristics; D014481:United States; D044465:White People