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Infant, PrematureBirth WeightInfant, NewbornInfant, Low Birth WeightInfant, Premature, DiseasesInfant, Very Low Birth WeightGestational AgeInfant, Extremely Low Birth WeightPregnancyInfant CareBody WeightIntensive Care Units, NeonatalBronchopulmonary DysplasiaEnterocolitis, NecrotizingPremature BirthInfant FoodRetinopathy of PrematurityInfant, Extremely PrematureWeight GainRespiratory Distress Syndrome, NewbornLeukomalacia, PeriventricularInfant MortalityIntensive Care, NeonatalChild DevelopmentInfant Nutritional Physiological PhenomenaInfant, Small for Gestational AgeInfant, Newborn, DiseasesInfant BehaviorInfant FormulaMilk, HumanWeight LossPregnancy OutcomeBreast FeedingDuctus Arteriosus, PatentNeonatologyDevelopmental DisabilitiesBirth RateMothersNeonatal NursingRisk FactorsFetal Growth RetardationCohort StudiesBirth OrderMaternal AgeProspective StudiesBottle FeedingSudden Infant DeathAnemia, NeonatalApgar ScoreBirth CertificatesSucking BehaviorPregnancy ComplicationsMolecular WeightFetal DevelopmentParenteral NutritionPrenatal CareApneaInfant WelfareRetrospective StudiesMaternal ExposureEnteral NutritionAnimals, NewbornPrenatal Exposure Delayed EffectsRespiration, ArtificialParityNeonatal ScreeningEchoencephalographyHeelFetal WeightFollow-Up StudiesObstetric Labor, PrematureTime FactorsTerm BirthGrowthPerinatologyBody HeightRegression AnalysisFetal MacrosomiaAsphyxia NeonatorumCerebral PalsyHyaline Membrane DiseaseDystociaCongenital AbnormalitiesPasteurizationAge FactorsOxygen Inhalation TherapyWeaningFetal DeathMother-Child RelationsBirth IntervalsFetal BloodDelivery, ObstetricDelivery RoomsPulmonary SurfactantsFetusTwinsCerebral HemorrhageHeadIncubators, InfantFetal Viability