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Contraceptive MethodsFamily PlanningContraceptive AgentsOral ContraceptivesDeveloped CountriesResearch MethodologyPrevention and ControlUrogenital SystemOral ContraceptivePsychological FactorsDemographic FactorsPopulation DynamicsReproductive BehaviorFertility ControlEndocrine SystemReproductive Tract InfectionsEconomic FactorsSigns and SymptomsAcquired Immunodeficiency SyndromeContraception