Pregnancy ComplicationsPregnancyPregnancy OutcomePre-EclampsiaParturitionHypertension, Pregnancy-InducedPregnancy Complications, CardiovascularNatural ChildbirthPregnancy Complications, HematologicFemale Urogenital Diseases and Pregnancy ComplicationsPregnancy Trimester, FirstPregnancy Complications, NeoplasticAbortion, SpontaneousPregnancy, EctopicFetal Growth RetardationAbruptio PlacentaeDelivery, ObstetricPremature BirthPregnancy, AnimalPlacentaCesarean SectionObstetric Labor ComplicationsPregnancy Trimester, ThirdPregnancy Trimester, SecondUterine ArteryPrenatal CareInfant, NewbornCivil DisordersPostoperative ComplicationsPregnancy Complications, InfectiousPlacenta DiseasesParityEclampsiaPregnancy, TwinObstetric Labor, PrematureHome ChildbirthPlacental CirculationGestational AgePregnancy, High-RiskTrophoblastsDiabetes, GestationalCongenital AbnormalitiesFetal DeathPreconception CareMaternal AgePregnancy, MultiplePuerperal DisordersRisk FactorsStillbirthInfant, Small for Gestational AgeUterusBirth WeightAbortion, HabitualUltrasonography, PrenatalMaternal WelfarePregnancy ProteinsPregnancy RateMidwiferyRetrospective StudiesAntibodies, AntiphospholipidMaternal Health ServicesPlacental InsufficiencyPregnancy TrimestersPlacentationLabor, ObstetricProspective StudiesMultiple Birth OffspringPregnancy TestsMaternal-Fetal ExchangeReproductive Techniques, AssistedPostpartum PeriodPregnancy in AdolescencePregnancy in DiabeticsInfant, Low Birth WeightPregnancy, TubalCohort StudiesAntiphospholipid SyndromeLabor PainPostnatal CareFetal DevelopmentFetal Membranes, Premature RuptureFertilization in VitroOdds RatioDepression, PostpartumLogistic ModelsDeciduaPrenatal EducationRisk AssessmentThrombophiliaEpisiotomyAbortion, InducedTreatment OutcomeQuestionnairesObstetricsMaternal MortalityPregnancy, UnplannedIncidenceNorwayPregnancy, UnwantedMothers