Pregnancy ComplicationsPregnancyPregnancy OutcomePre-EclampsiaPrenatal CareHypertension, Pregnancy-InducedPregnancy Complications, CardiovascularPregnancy Complications, HematologicPrenatal Exposure Delayed EffectsFemale Urogenital Diseases and Pregnancy ComplicationsPregnancy Trimester, FirstPrenatal DiagnosisAbortion, SpontaneousFetal Growth RetardationPregnancy, EctopicPregnancy Complications, NeoplasticAbruptio PlacentaePremature BirthUltrasonography, PrenatalPregnancy, AnimalPlacentaPregnancy Trimester, SecondPregnancy Trimester, ThirdInfant, NewbornGestational AgeUterine ArteryPlacenta DiseasesCivil DisordersPregnancy Complications, InfectiousPostoperative ComplicationsObstetric Labor, PrematureFetal DeathCongenital AbnormalitiesEclampsiaPregnancy, TwinPlacental CirculationPregnancy, High-RiskDiabetes, GestationalTrophoblastsPreconception CareCesarean SectionPregnancy, MultipleObstetric Labor ComplicationsBirth WeightStillbirthInfant, Small for Gestational AgeMaternal AgeUterusRisk FactorsAbortion, HabitualPregnancy ProteinsMaternal-Fetal ExchangeParityPregnancy TrimestersPregnancy RateRetrospective StudiesAntibodies, AntiphospholipidPlacental InsufficiencyDelivery, ObstetricFetal DevelopmentPlacentationMultiple Birth OffspringPregnancy TestsProspective StudiesInfant, Low Birth WeightPregnancy in DiabeticsFetal DiseasesMaternal WelfarePregnancy, TubalAntiphospholipid SyndromeReproductive Techniques, AssistedPregnancy in AdolescenceCohort StudiesFetal Membranes, Premature RuptureFertilization in VitroOdds RatioDeciduaLogistic ModelsThrombophiliaRisk AssessmentTreatment OutcomePregnancy, UnplannedMaternal ExposurePregnancy, UnwantedAbortion, InducedInfant, PrematureIntraoperative ComplicationsHomocysteineIncidenceFetusPregnancy Complications, ParasiticNorwayUnited StatesTime FactorsPregnancy, ProlongedQuestionnairesCase-Control StudiesAmniocentesisPrevalenceFollow-Up Studies