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Continuous, daily levonorgestrel/ethinyl estradiol vs. 21-day, cyclic levonorgestrel/ethinyl estradiol: efficacy, safety and bleeding in a randomized, open-label trial

Open-label TrialHormonal ContraceptiveDaily Levonorgestrel/ethinyl EstradiolMedicineGynecologyCyclic Levonorgestrel/ethinyl EstradiolPharmacotherapyEndocrinologyPharmacologyOvarian HormoneAnesthesiology