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Retrospective vs. Prospective Coital Frequency and Menstrual Cycle Length in a Contraceptive Effectiveness Trial

Family MedicineContraceptive UseMenstrual Cycle LengthHormonal ContraceptiveFertilityOral ContraceptiveContraceptive DiscontinuationReproductive HealthGynecologyRetrospective VsMenstrual CycleContraceptive CoercionFamily PlanningContraceptionPublic HealthMenstrual HealthSexual And Reproductive HealthPregnancy PreventionHormonal Male ContraceptionSexual HealthProspective Coital FrequencyContraceptive UptakeMedicineWomen's Health