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PregnancyPregnancy OutcomePregnancy ComplicationsPregnancy, AnimalPregnancy, EctopicPregnancy Trimester, FirstPregnancy Trimester, ThirdPregnancy RatePregnancy Complications, CardiovascularPregnancy TrimestersPregnancy TestsPregnancy, MultiplePregnancy Trimester, SecondPregnancy in DiabeticsPregnancy, TubalPregnancy Complications, NeoplasticPregnancy in AdolescencePregnancy Complications, InfectiousAbortion, SpontaneousGestational AgePregnancy, High-RiskPregnancy ProteinsPregnancy, UnplannedInfant, NewbornPregnancy, UnwantedPregnancy Complications, HematologicPlacentaPre-EclampsiaFetal DeathCongenital AbnormalitiesPregnancy, ProlongedPregnancy, TwinUltrasonography, PrenatalUterusAbortion, InducedAbnormalities, MultiplePregnancy, AbdominalEmbryo ImplantationPregnancy Complications, ParasiticFertilization in VitroPregnancy MaintenanceEmbryo TransferPrenatal Exposure Delayed EffectsPrenatal CareMaternal-Fetal ExchangeAbnormalities, Drug-InducedChromosome AberrationsParityBirth WeightMaternal AgeTime FactorsPrenatal DiagnosisFetusProspective StudiesFetal Growth RetardationFetal DiseasesPregnancy Reduction, MultifetalHypertension, Pregnancy-InducedCesarean SectionRisk FactorsProgesteroneInfertility, FemaleFetal DevelopmentChromosome DisordersPremature BirthRetrospective StudiesLactationDeciduaLabor, ObstetricMaternal ExposureKaryotypingTwinsObstetric Labor, PrematureAbortion, HabitualFertilityAbortion, TherapeuticCohort StudiesChorionic GonadotropinDiabetes, GestationalTrophoblastsMagnetic Resonance ImagingCase-Control StudiesSperm Injections, IntracytoplasmicPlacenta DiseasesInsemination, ArtificialPuerperal DisordersDelivery, ObstetricAmniotic FluidEndometriumAbortifacient Agents, NonsteroidalInfertilityInfant, Low Birth WeightBrainEye AbnormalitiesStillbirthPreconception CareReproductive Techniques, AssistedPregnant WomenReference ValuesChorionic Gonadotropin, beta Subunit, Human