Pregnancy ComplicationsPregnancyPregnancy OutcomePre-EclampsiaHeartHypertension, 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, ThirdPostoperative ComplicationsHeart RateCivil DisordersPlacenta DiseasesPregnancy Complications, InfectiousEclampsiaObstetric Labor, PrematurePregnancy, TwinInfant, NewbornGestational AgePlacental CirculationCongenital AbnormalitiesTrophoblastsFetal DeathDiabetes, GestationalPreconception CarePregnancy, High-RiskPregnancy, MultipleCesarean SectionObstetric Labor ComplicationsRisk FactorsStillbirthPrenatal CareUltrasonography, PrenatalUterusInfant, Small for Gestational AgeAbortion, HabitualPregnancy ProteinsBirth WeightPregnancy RateMaternal AgeRetrospective StudiesParityAntibodies, AntiphospholipidPlacental InsufficiencyProspective StudiesPregnancy TrimestersPlacentationMultiple Birth OffspringPregnancy TestsMaternal-Fetal ExchangeDelivery, ObstetricHeart FailurePregnancy in DiabeticsPregnancy, TubalAntiphospholipid SyndromeFetal DevelopmentMaternal WelfareCohort StudiesReproductive Techniques, AssistedInfant, Low Birth WeightHeart DiseasesFertilization in VitroFetal Membranes, Premature RuptureHeart Defects, CongenitalPregnancy in AdolescenceTreatment OutcomeOdds RatioDeciduaRisk AssessmentHeart TransplantationThrombophiliaLogistic ModelsTime FactorsPregnancy, UnplannedFetal HeartPregnancy, UnwantedIncidenceIntraoperative ComplicationsHomocysteineNorwayFollow-Up StudiesInfant, PrematureUnited StatesCase-Control StudiesPregnancy Complications, ParasiticPregnancy, ProlongedPrevalenceQuestionnaires