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Prenatal CarePregnancyPregnancy TrimestersPregnancy Trimester, FirstPregnancy Trimester, ThirdPregnancy Trimester, SecondPregnancy ComplicationsPregnancy OutcomeInfant, NewbornInfant, Low Birth WeightPrenatal Exposure Delayed EffectsPregnancy Complications, InfectiousPrenatal DiagnosisMaternal AgeUltrasonography, PrenatalPregnancy, AnimalBirth WeightPregnancy, EctopicGestational AgePregnancy Complications, CardiovascularBrazilFetal DiseasesUnited StatesSocioeconomic FactorsOffice VisitsAbortion, SpontaneousPregnancy RatePregnancy in DiabeticsPregnancy Complications, NeoplasticPregnancy, MultiplePregnancy TestsPlacentaAbortion, InducedPre-EclampsiaPregnancy, High-RiskPregnancy in AdolescencePregnancy, TubalMaternal ExposureFetusFetal DeathMaternal-Fetal ExchangePregnancy ProteinsFetal DevelopmentPregnancy Complications, HematologicTrophoblastsAmniocentesisPregnancy, UnplannedFetal Growth RetardationAbnormalities, Drug-InducedChorionic Villi SamplingChorionic VilliProspective StudiesPregnancy, UnwantedParityDeciduaPregnancy Complications, ParasiticUterusAbortion, TherapeuticPregnancy, TwinCongenital AbnormalitiesPremature BirthDown SyndromePregnant WomenHypertension, Pregnancy-InducedCrown-Rump LengthCohort StudiesAbortifacient Agents, NonsteroidalAmniotic FluidCesarean SectionRisk FactorsAbortion, EugenicPregnancy, ProlongedRetrospective StudiesObstetric Labor, PrematurePregnancy MaintenancePregnancy, AbdominalChorionic Gonadotropin, beta Subunit, HumanFertilization in VitroFetal HeartEmbryo ImplantationMothersDiabetes, GestationalMaternal Nutritional Physiological PhenomenaEmbryo TransferAbortion, HabitualLabor, ObstetricPlacentationFetal Alcohol Spectrum DisordersEmbryonic and Fetal DevelopmentTime FactorsPlacenta DiseasesDelivery, ObstetricChorionic GonadotropinMisoprostolTwinsFetal BloodInfant, Small for Gestational AgePuerperal DisordersPlacental CirculationPostpartum Period