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Pregnancy ComplicationsPregnancyPregnancy OutcomePregnancy, AnimalPregnancy Trimester, FirstPre-EclampsiaAbortion, SpontaneousPregnancy, EctopicPregnancy Complications, CardiovascularHypertension, Pregnancy-InducedPregnancy Complications, HematologicPregnancy Complications, NeoplasticPregnancy Trimester, SecondPregnancy Trimester, ThirdFemale Urogenital Diseases and Pregnancy ComplicationsPlacentaFetal Growth RetardationPregnancy TestsGestational AgeUterusPregnancy ProteinsPremature BirthPregnancy Complications, InfectiousPregnancy, MultipleAbruptio PlacentaePregnancy RatePregnancy TrimestersFetal DeathTrophoblastsInfant, NewbornDeciduaPregnancy, High-RiskUterine ArteryUltrasonography, PrenatalPregnancy, TwinPlacenta DiseasesEmbryo ImplantationAbortion, HabitualObstetric Labor, PrematureCongenital AbnormalitiesPregnancy in DiabeticsDiabetes, GestationalPregnancy, TubalPreconception CarePlacental CirculationPrenatal CareCivil DisordersEclampsiaPostoperative ComplicationsCesarean SectionEndometriumBirth WeightMaternal AgePregnancy in AdolescencePlacentationParityMaternal-Fetal ExchangeInfant, Small for Gestational AgeStillbirthObstetric Labor ComplicationsRisk FactorsFetal DevelopmentAbortifacient Agents, NonsteroidalProgesteroneFertilization in VitroProspective StudiesAbortion, InducedRetrospective StudiesPregnancy, UnplannedPregnancy, UnwantedDelivery, ObstetricReproductive Techniques, AssistedAntibodies, AntiphospholipidChorionic GonadotropinInfant, Low Birth WeightPlacental InsufficiencyAbortion, ThreatenedCohort StudiesMisoprostolMultiple Birth OffspringPregnancy MaintenanceEstrusPregnancy Complications, ParasiticCorpus LuteumPregnancy, ProlongedEmbryo TransferMaternal WelfareOdds RatioAbortion, TherapeuticVacuum CurettageAntiphospholipid SyndromePregnancy Tests, ImmunologicPrenatal Exposure Delayed EffectsFetal Membranes, Premature RuptureEstrous CycleUterine HemorrhageTime FactorsAbortifacient AgentsLogistic ModelsPregnancy, Abdominal