Pregnancy ComplicationsPregnancyPregnancy OutcomePre-EclampsiaHypertension, Pregnancy-InducedPregnancy Complications, CardiovascularPregnancy Complications, HematologicFemale Urogenital Diseases and Pregnancy ComplicationsPregnancy Trimester, FirstPregnancy, EctopicAbortion, SpontaneousPregnancy Complications, NeoplasticFetal Growth RetardationAbruptio PlacentaePremature BirthPregnancy, AnimalPlacentaPregnancy Trimester, SecondUterine ArteryPregnancy Trimester, ThirdCivil DisordersPostoperative ComplicationsPlacenta DiseasesPregnancy Complications, InfectiousEclampsiaPregnancy, TwinObstetric Labor, PrematureInfant, NewbornPlacental CirculationGestational AgeTrophoblastsDiabetes, GestationalCongenital AbnormalitiesFetal DeathPreconception CarePregnancy, High-RiskPregnancy, MultipleCesarean SectionObstetric Labor ComplicationsStillbirthPrenatal CareAcute DiseaseInfant, Small for Gestational AgeUterusAbortion, HabitualUltrasonography, PrenatalRisk FactorsPregnancy ProteinsBirth WeightPregnancy RateMaternal AgeRetrospective StudiesParityAntibodies, AntiphospholipidPlacental InsufficiencyPregnancy TrimestersPlacentationMultiple Birth OffspringPregnancy TestsDelivery, ObstetricMaternal-Fetal ExchangeProspective StudiesPregnancy in DiabeticsPregnancy, TubalAntiphospholipid SyndromeMaternal WelfareReproductive Techniques, AssistedFetal DevelopmentInfant, Low Birth WeightFetal Membranes, Premature RuptureFertilization in VitroCohort StudiesPregnancy in AdolescenceDeciduaOdds RatioThrombophiliaTreatment OutcomeTime FactorsPregnancy Complications, ParasiticLogistic ModelsPregnancy, UnplannedRisk AssessmentPregnancy, UnwantedIncidenceIntraoperative ComplicationsHomocysteineNorwayInfant, PrematureInfectionCase-Control StudiesPregnancy, ProlongedPrevalenceToxoplasmosisAbortion, InducedUnited StatesFollow-Up StudiesQuestionnairesBiological MarkersConfidence IntervalsPregnancy, Abdominal