Vaginal cytology during oral contraception.
D003276:Contraceptives, Oral / Q000494:pharmacology*; D003277:Contraceptives, Oral, Combined / Q000494:pharmacology*; D005260:Female; D006801:Humans; D014621:Vagina / Q000166:cytology*
D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined