Oral contraception, coital frequency, and the time required to conceive.
D000328:Adult; D000367:Age Factors; D003075:Coitus; D003276:Contraceptives, Oral / Q000494:pharmacology*; D003278:Contraceptives, Oral, Hormonal / Q000494:pharmacology*; D005260:Female; D005298:Fertility / Q000187:drug effects*; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D011247:Pregnancy; D013997:Time Factors; D014481:United States
D003276:Contraceptives, Oral; D003278:Contraceptives, Oral, Hormonal