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Abstract
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Keywords:
AmericasBiologyContraceptionContraceptive Agents, Estrogen--side effectsContraceptive Agents, Estrogen--standardsContraceptive Agents, Estrogen--therapeutic useContraceptive Agents, Female--side effectsContraceptive Agents, Female--standardsContraceptive Agents, Female--therapeutic useContraceptive Agents--side effectsContraceptive Agents--standardsContraceptive Agents--therapeutic useDeveloped CountriesEndocrine SystemEstrogens--side effectsEstrogens--standardsEstrogens--therapeutic useFamily PlanningGovernment AgenciesHormonesNorth AmericaNorthern AmericaOrganizationsPhysiologyUnited States