PregnancyRisk FactorsPregnancy ComplicationsPregnancy OutcomePregnancy, AnimalPregnancy, EctopicPregnancy Trimester, FirstPregnancy Trimester, ThirdPregnancy RatePregnancy Complications, CardiovascularPregnancy TrimestersPregnancy TestsPregnancy, MultiplePregnancy in DiabeticsPregnancy Trimester, SecondPregnancy, TubalPregnancy Complications, NeoplasticPregnancy Complications, InfectiousPregnancy in AdolescenceAbortion, SpontaneousInfant, NewbornGestational AgePregnancy, High-RiskPregnancy ProteinsPregnancy, UnplannedPregnancy, UnwantedProspective StudiesPrevalenceCase-Control StudiesCohort StudiesPregnancy Complications, HematologicRetrospective StudiesPre-EclampsiaIncidenceLogistic ModelsPregnancy, TwinPlacentaPregnancy, ProlongedSmokingFetal DeathParityOdds RatioCardiovascular DiseasesAbortion, InducedPregnancy Complications, ParasiticAge FactorsCross-Sectional StudiesPrenatal CareRisk AssessmentPregnancy, AbdominalUterusMultivariate AnalysisBirth WeightUltrasonography, PrenatalPregnancy MaintenanceTime FactorsFollow-Up StudiesEmbryo ImplantationPrenatal Exposure Delayed EffectsMaternal AgeEmbryo TransferFertilization in VitroMaternal-Fetal ExchangeQuestionnairesCesarean SectionHypertension, Pregnancy-InducedPremature BirthSex FactorsBody Mass IndexHypertensionFetal Growth RetardationPregnancy Reduction, MultifetalUnited StatesObesitySocioeconomic FactorsProgesteroneInfertility, FemaleObstetric Labor, PrematureRiskTwinsDiabetes, GestationalRegression AnalysisCongenital AbnormalitiesMaternal ExposureLactationFetal DevelopmentInfant, Low Birth WeightAbnormalities, Drug-InducedLongitudinal StudiesDelivery, ObstetricLabor, ObstetricFetusTreatment OutcomePrenatal DiagnosisPuerperal DisordersDeciduaBiological MarkersChorionic GonadotropinAbortion, TherapeuticAbortion, Habitual