Birth OrderMortalityBirth WeightMaternal AgePaternal AgeInfant, NewbornInfant MortalitySiblingsPregnancyInfant, Low Birth WeightBirth IntervalsBirth RateSex RatioPremature BirthHospital MortalityFamily CharacteristicsParityRisk FactorsCohort StudiesAzerbaijanSibling RelationsGestational AgeCause of DeathTwinsGravidityOdds RatioDelivery, ObstetricMothersAge FactorsEczemaCase-Control StudiesProspective StudiesFetal DeathBreast FeedingIncidenceLogistic ModelsBirth CertificatesChild MortalityRegression AnalysisSex FactorsRegistriesGender IdentityUnited StatesSocioeconomic FactorsNorwaySwedenSocial ClassHypersensitivity, ImmediateMaternal MortalityRiskPrenatal Exposure Delayed EffectsRetrospective StudiesIntelligence TestsEducational StatusFollow-Up StudiesTime FactorsMaternal ExposureMultivariate AnalysisProportional Hazards ModelsConfidence IntervalsGreat BritainTreatment OutcomePrevalenceRhinitis, Allergic, Seasonal