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PregnancyPregnancy OutcomePregnancy ComplicationsPregnancy, AnimalPregnancy, EctopicTreatment OutcomePregnancy Trimester, FirstPregnancy RatePregnancy Trimester, ThirdPregnancy Complications, CardiovascularPregnancy TrimestersPregnancy TestsPregnancy, MultipleOutcome Assessment (Health Care)Pregnancy Trimester, SecondPregnancy in DiabeticsPregnancy, TubalPregnancy Complications, NeoplasticRisk FactorsPregnancy in AdolescencePregnancy Complications, InfectiousInfant, NewbornRetrospective StudiesAbortion, SpontaneousPregnancy, High-RiskProspective StudiesGestational AgePregnancy, UnplannedPregnancy ProteinsPregnancy, UnwantedFollow-Up StudiesTime FactorsPregnancy Complications, HematologicPre-EclampsiaFetal DeathCohort StudiesPlacentaPregnancy, TwinPregnancy, ProlongedPrognosisRisk AssessmentPrenatal CareUltrasonography, PrenatalAbortion, InducedFertilization in VitroEmbryo TransferUterusEmbryo ImplantationPregnancy Complications, ParasiticBirth WeightPregnancy, AbdominalPregnancy MaintenanceParityPrenatal Exposure Delayed EffectsPremature BirthCesarean SectionPredictive Value of TestsOutcome and Process Assessment (Health Care)Maternal-Fetal ExchangeMaternal AgeLogistic ModelsFetal Growth RetardationHypertension, Pregnancy-InducedRiskInfertility, FemaleUnited StatesCongenital AbnormalitiesPregnancy Reduction, MultifetalAge FactorsIncidenceObstetric Labor, PrematurePrenatal DiagnosisInfant, Low Birth WeightMultivariate AnalysisProgesteroneDelivery, ObstetricSeverity of Illness IndexDiabetes, GestationalFetal DevelopmentAbnormalities, Drug-InducedRecurrenceTwinsLabor, ObstetricFetusPrevalenceCase-Control StudiesFetal DiseasesMaternal ExposureSurvival AnalysisLongitudinal StudiesOdds RatioChorionic GonadotropinLactationPostoperative ComplicationsRandomized Controlled Trials as TopicSperm Injections, IntracytoplasmicSurvival RateCross-Sectional StudiesStillbirthDecidua