PregnancyPregnancy OutcomePregnancy ComplicationsPregnancy, AnimalPregnancy, EctopicPregnancy Trimester, FirstPregnancy Trimester, ThirdPregnancy RatePregnancy Complications, CardiovascularPregnancy TestsPregnancy TrimestersPregnancy, MultiplePregnancy Trimester, SecondPregnancy in DiabeticsPregnancy, TubalPregnancy Complications, NeoplasticPregnancy in AdolescencePrenatal DiagnosisPregnancy Complications, InfectiousAbortion, SpontaneousInfant, NewbornPregnancy ProteinsGestational AgePregnancy, High-RiskPregnancy, UnplannedPregnancy, UnwantedDelayed DiagnosisPregnancy Complications, HematologicEarly DiagnosisSensitivity and SpecificityUltrasonography, PrenatalPre-EclampsiaPlacentaPregnancy, TwinPregnancy, ProlongedRetrospective StudiesFetal DeathAbortion, InducedUterusPregnancy Complications, ParasiticProspective StudiesPregnancy, AbdominalPregnancy MaintenanceEmbryo ImplantationEmbryo TransferFertilization in VitroRisk FactorsPrenatal CareFetal DiseasesDiagnosisMaternal-Fetal ExchangeParityTime FactorsPrenatal Exposure Delayed EffectsBirth WeightCohort StudiesCesarean SectionMaternal AgePregnancy Reduction, MultifetalHypertension, Pregnancy-InducedFetal Growth RetardationInfertility, FemaleCongenital AbnormalitiesAbortion, TherapeuticProgesteroneFetusPremature BirthDiagnostic ErrorsPredictive Value of TestsAbnormalities, Drug-InducedFetal DevelopmentLactationTwinsLabor, ObstetricObstetric Labor, PrematureDeciduaDiabetes, GestationalPreimplantation DiagnosisAmniotic FluidFollow-Up StudiesChorionic GonadotropinMaternal ExposureTreatment OutcomePuerperal DisordersCase-Control StudiesTrophoblastsDelivery, ObstetricAbortion, HabitualBiopsyReproducibility of ResultsAbortifacient Agents, NonsteroidalTomography, X-Ray ComputedInsemination, ArtificialPlacenta DiseasesEndometriumInfertilitySperm Injections, IntracytoplasmicFertilityInfant, Low Birth WeightIncidence