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A multicenter study of levonorgestrel-estradiol contraceptive vaginal rings. I-Use effectiveness. An international

I Sivin, D R Mishell, A Victor

    Contraception
    |October 1, 1981
    PubMed
    Abstract

    No abstract available in PubMed .

    Keywords:
    Abortion, InducedAbortion, SpontaneousAge FactorsBlood PressureBody WeightBrazilChileClinical ResearchContraceptionContraception ContinuationContraception FailureContraception TerminationContraceptive AgentsContraceptive Agents, EstrogenContraceptive Agents, FemaleContraceptive Agents, ProgestinContraceptive EffectivenessContraceptive Methods--side effectsContraceptive UsageDeliveryDemographic FactorsDenmarkDermatological EffectsDominican RepublicEthinyl EstradiolFamily PlanningFertilityFetal DeathFinlandHeadacheHemoglobin LevelLevonorgestrelMenstruation DisordersNauseaNigeriaOral Contraceptives, CombinedOral Contraceptives--side effectsParityPopulationPopulation CharacteristicsPopulation DynamicsPregnancy, EctopicPregnancy, UnplannedReproductive BehaviorResearch MethodologySwedenUnited StatesUse-effectivenessVaginal Rings--side effects

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