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Summary
No abstract available in PubMed .
Keywords:
AmericasContraceptionContraceptive AgentsContraceptive Agents, EstrogenContraceptive Agents, FemaleContraceptive Agents, ProgestinContraceptive MethodsDeveloped CountriesEthinyl EstradiolFamily PlanningLegislationLevonorgestrelNorth AmericaNorthern AmericaOral ContraceptivesOral Contraceptives, CombinedOral Contraceptives, Low-doseProduct ApprovalUnited States