Triphasic versus monophasic oral contraceptives for contraception

Contraception [methods]Contraceptives, Oral, Hormonal [adverse effectstherapeutic use]Drug CombinationsEthinyl Estradiol [adverse effectsLevonorgestrel [adverse effectsMenstruation Disturbances [chemically induced]Norethindrone [adverse effectsPatient ComplianceRandomized Controlled Trials as TopicFemaleHumans