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Birth WeightPregnancyInfant, Low Birth WeightInfant, NewbornInfant, Very Low Birth WeightBody WeightInfant, Extremely Low Birth WeightGestational AgeWeight GainPremature BirthWeight LossInfant, PrematurePregnancy OutcomeInfant, Small for Gestational AgeBirth RateBirth OrderMolecular WeightInfant MortalityMaternal AgeInfant, Premature, DiseasesFetal DevelopmentBirth CertificatesFetal Growth RetardationPregnancy ComplicationsMaternal ExposureIntensive Care Units, NeonatalChild DevelopmentCohort StudiesFetal WeightRisk FactorsParityPrenatal Exposure Delayed EffectsDystociaMothersFetal MacrosomiaPrenatal CareBody HeightApgar ScoreBirth IntervalsWeaningBronchopulmonary DysplasiaCongenital AbnormalitiesProspective StudiesFetal DeathBody Mass IndexDelivery, ObstetricBirth InjuriesBreedingObstetric Labor, PrematureRetinopathy of PrematurityRegression AnalysisInfant, Newborn, DiseasesDevelopmental DisabilitiesAnthropometryLitter SizeRetrospective StudiesObesityPregnancy Trimester, ThirdPerinatal CareBreast FeedingOrgan SizeMaternal Nutritional Physiological PhenomenaAnimals, NewbornMultiple Birth OffspringGrowthCesarean SectionStillbirthPlacentaIllegitimacyTripletsSocioeconomic FactorsIntensive Care, NeonatalTwinsFollow-Up StudiesLogistic ModelsEnterocolitis, NecrotizingTime FactorsInfant WelfareInfant CarePerinatologyPregnancy Complications, ParasiticAge FactorsLinear ModelsBody CompositionOdds RatioPerinatal MortalityObstetric Labor ComplicationsPregnancy TrimestersEmbryonic and Fetal DevelopmentSex FactorsBody SizeCattleLabor, ObstetricBody ConstitutionUltrasonography, PrenatalPregnancy, AnimalCase-Control StudiesFathersFetusUnited States