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Serum Nestorone® and ethinyl estradiol levels, and ovulation inhibition in women using three different dosage combinations of a Nestorone progestogen–ethinyl estradiol contraceptive vaginal ring on a bleeding-signaled regimen

ContraceptionHormonal ContraceptiveFertilityFemale InfertilityOral ContraceptiveMedicineReproductive HealthGynecologySerum Nestorone®Female Reproductive FunctionReproductive MedicineDifferent Dosage CombinationsEndocrinologyPharmacologyOvulation InhibitionPublic HealthWomen's HealthReproductive Endocrinology