Birth WeightPremature BirthBirth RateInfant, Low Birth WeightInfant, NewbornPregnancyBirth OrderBirth CertificatesGestational AgeBirth IntervalsPregnancy OutcomeBirth InjuriesMultiple Birth OffspringMaternal AgeCongenital AbnormalitiesCohort StudiesInfant MortalityAgingRisk FactorsTime FactorsDelivery, ObstetricPregnancy ComplicationsCognition DisordersParityAnimals, NewbornLongitudinal StudiesVaginal Birth after CesareanAge FactorsInfant, Small for Gestational AgePrenatal CareMaternal ExposureProspective StudiesFetal DeathHome ChildbirthUnited StatesPrenatal Exposure Delayed EffectsMothersObstetric Labor, PrematureMidwiferyCesarean SectionFollow-Up StudiesFetal DevelopmentChild DevelopmentStillbirthPerinatal CareIncidenceRegression AnalysisRetrospective StudiesSocioeconomic FactorsInfant, Premature, DiseasesSex RatioLinear ModelsBody WeightBody HeightPregnancy in AdolescenceLogistic ModelsPregnancy, MultipleCognitionNeuropsychological TestsPrevalenceLabor, ObstetricObstetric Labor ComplicationsApgar ScoreBreast FeedingSex FactorsPaternal AgeEducational StatusOdds RatioAsphyxia NeonatorumSeasonsVital StatisticsMaternal Health ServicesRegistriesFetusFertilityIllegitimacyWeaningIntensive Care Units, NeonatalWeight GainPerinatal MortalityCase-Control StudiesBirthing CentersSmokingGrowthDisease ProgressionReproductionPregnancy Complications, InfectiousCross-Sectional StudiesMaternal-Fetal ExchangePopulation DynamicsBrainLitter SizeReproductive Techniques, AssistedInfant CareDenmarkMaternal WelfareEuropean Continental Ancestry GroupAnalysis of VarianceAbortion, SpontaneousAbnormalities, Drug-Induced