PrevalencePregnancyPregnancy ComplicationsPregnancy OutcomeIncidencePregnancy, AnimalPregnancy, EctopicPregnancy Trimester, FirstPregnancy Trimester, ThirdPregnancy RatePregnancy Complications, CardiovascularPregnancy TrimestersRisk FactorsPregnancy TestsPregnancy, MultiplePregnancy in DiabeticsPregnancy Trimester, SecondPregnancy, TubalInfant, NewbornPregnancy Complications, InfectiousPregnancy Complications, NeoplasticPregnancy in AdolescenceAbortion, SpontaneousCross-Sectional StudiesPregnancy, UnplannedGestational AgeRetrospective StudiesProspective StudiesPregnancy, High-RiskPregnancy ProteinsPregnancy, UnwantedCohort StudiesPregnancy Complications, HematologicAge DistributionTime FactorsPre-EclampsiaFetal DeathPlacentaPregnancy, ProlongedUnited StatesPregnancy, TwinSex DistributionAbortion, InducedPregnancy Complications, ParasiticQuestionnairesPrenatal CareUterusParityBrazilLogistic ModelsUltrasonography, PrenatalFollow-Up StudiesPregnancy, AbdominalFertilization in VitroEmbryo ImplantationPregnancy MaintenanceSmokingEmbryo TransferBirth WeightAge FactorsSocioeconomic FactorsPopulation SurveillanceMaternal-Fetal ExchangePrenatal Exposure Delayed EffectsMaternal AgeRural PopulationOdds RatioHealth SurveysCesarean SectionCase-Control StudiesCongenital AbnormalitiesRisk AssessmentIndiaTreatment OutcomeRegistriesUrban PopulationHIV InfectionsHypertension, Pregnancy-InducedChinaSex FactorsInfertility, FemalePremature BirthPregnancy Reduction, MultifetalFetal Growth RetardationPrenatal DiagnosisProgesteroneJapanEpidemiologic MethodsLactationLabor, ObstetricObstetric Labor, PrematureDiabetes, GestationalMass ScreeningFetusAbnormalities, Drug-InducedRiskPuerperal DisordersTwinsLongitudinal StudiesFetal Development