The choice of a combined oral contraceptive.
D003276:Contraceptives, Oral / Q000008:administration & dosage; D003277:Contraceptives, Oral, Combined / Q000008:administration & dosage / Q000009:adverse effects; D005260:Female; D006801:Humans
D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined