Pregnancy ComplicationsPregnancyPregnancy OutcomeFetusPre-EclampsiaPregnancy Complications, CardiovascularPregnancy, AnimalPregnancy Trimester, FirstPregnancy, EctopicHypertension, Pregnancy-InducedPregnancy Complications, HematologicPregnancy Complications, NeoplasticAbortion, SpontaneousPregnancy Trimester, ThirdFemale Urogenital Diseases and Pregnancy ComplicationsPregnancy Trimester, SecondFetal Growth RetardationPlacentaGestational AgePremature BirthAbruptio PlacentaePregnancy, MultiplePregnancy Complications, InfectiousPregnancy RateInfant, NewbornFetal DeathUltrasonography, PrenatalPregnancy, TwinPregnancy, High-RiskPregnancy TrimestersPlacenta DiseasesUterine ArteryPregnancy TestsObstetric Labor, PrematurePregnancy in DiabeticsCongenital AbnormalitiesPregnancy ProteinsTrophoblastsPlacental CirculationEclampsiaCivil DisordersPostoperative ComplicationsDiabetes, GestationalCesarean SectionPregnancy, TubalUterusPreconception CarePrenatal CareMaternal-Fetal ExchangeObstetric Labor ComplicationsPregnancy in AdolescenceStillbirthBirth WeightMaternal AgeAbortion, HabitualInfant, Small for Gestational AgeParityRisk FactorsFetal DevelopmentRetrospective StudiesPregnancy, UnplannedDelivery, ObstetricPlacental InsufficiencyPregnancy, UnwantedPlacentationFertilization in VitroProspective StudiesAntibodies, AntiphospholipidFetal DiseasesInfant, Low Birth WeightMultiple Birth OffspringDeciduaReproductive Techniques, AssistedPregnancy, ProlongedMaternal WelfarePregnancy Complications, ParasiticAbortion, InducedCohort StudiesFetal Membranes, Premature RuptureAntiphospholipid SyndromeCampylobacter fetusPregnancy, AbdominalOdds RatioPregnancy MaintenanceEmbryo ImplantationEmbryo TransferPrenatal DiagnosisLogistic ModelsTritrichomonas foetusPrenatal Exposure Delayed EffectsThrombophiliaTreatment OutcomeRisk AssessmentPregnancy Reduction, MultifetalTime FactorsAbnormalities, Drug-InducedInfant, PrematureIncidenceAmniotic FluidNorway