Pregnancy ComplicationsPregnancyPregnancy OutcomePre-EclampsiaHypertension, Pregnancy-InducedPregnancy Complications, CardiovascularPregnancy Complications, HematologicFemale Urogenital Diseases and Pregnancy ComplicationsPregnancy Trimester, FirstAbortion, SpontaneousPregnancy, EctopicPregnancy Complications, NeoplasticFetal Growth RetardationAbruptio PlacentaePremature BirthPregnancy, AnimalPlacentaPregnancy Trimester, SecondUterine ArteryPregnancy Trimester, ThirdCivil DisordersPostoperative ComplicationsPlacenta DiseasesPregnancy Complications, InfectiousEclampsiaPregnancy, TwinObstetric Labor, PrematureInfant, NewbornGestational AgeFetal DeathCongenital AbnormalitiesPlacental CirculationTrophoblastsDiabetes, GestationalPreconception CarePregnancy, High-RiskPregnancy, MultipleCesarean SectionObstetric Labor ComplicationsPeptide Chain Termination, TranslationalStillbirthUltrasonography, PrenatalPrenatal CareUterusAbortion, HabitualInfant, Small for Gestational AgePregnancy ProteinsBirth WeightRisk FactorsMaternal AgePregnancy RateParityTerminator Regions, GeneticAntibodies, AntiphospholipidRetrospective StudiesPregnancy TrimestersPlacental InsufficiencyPlacentationMultiple Birth OffspringPregnancy TestsPeptide Termination FactorsMaternal-Fetal ExchangeDelivery, ObstetricAbortion, InducedProspective StudiesPregnancy in DiabeticsPregnancy, TubalAntiphospholipid SyndromeMaternal WelfareReproductive Techniques, AssistedFetal DevelopmentInfant, Low Birth WeightTranscription Termination, GeneticFertilization in VitroFetal Membranes, Premature RupturePregnancy in AdolescenceDeciduaCohort StudiesOdds RatioThrombophiliaTreatment OutcomeCodon, TerminatorLogistic ModelsPregnancy, UnwantedRho FactorPregnancy, UnplannedRisk AssessmentIntraoperative ComplicationsTime FactorsHomocysteineIncidenceNorwayPregnancy Complications, ParasiticInfant, PrematureAbortion, LegalPregnancy, ProlongedBase SequenceAbortion, TherapeuticUnited StatesCase-Control Studies