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Gestational AgeInfant, Small for Gestational AgeAnimals, NewbornPregnancyAgingChick EmbryoGene Expression Regulation, DevelopmentalInfant, NewbornAge FactorsInfant, PrematureBirth WeightRats, Sprague-DawleyNeuronsRNA, MessengerUltrasonography, PrenatalPremature BirthPregnancy OutcomeFetal Growth RetardationInfant, Premature, DiseasesInfant, Low Birth WeightPregnancy Trimester, SecondFetusPregnancy Trimester, ThirdFetal DevelopmentInfant, Very Low Birth WeightObstetric Labor, PrematurePregnancy ComplicationsCrown-Rump LengthPregnancy Trimester, FirstAmniotic FluidIntensive Care Units, NeonatalTerm BirthFetal HeartFetal DiseasesMaternal AgeApgar ScoreRetinopathy of PrematurityTwinsRespiratory Distress Syndrome, NewbornInfant MortalityProspective StudiesPre-EclampsiaUmbilical ArteriesPlacentaFetal DeathChild DevelopmentBronchopulmonary DysplasiaIntensive Care, NeonatalDelivery, ObstetricStillbirthPrenatal DiagnosisReference ValuesInfant, Newborn, DiseasesInfant, Extremely Low Birth WeightCohort StudiesFetal WeightRetrospective StudiesRisk FactorsInfant, Extremely PrematureFetal BloodEmbryonic and Fetal DevelopmentFetal MacrosomiaFetal Organ MaturityChorioamnionitisCesarean SectionFetal Membranes, Premature RuptureDevelopmental DisabilitiesPrenatal CareBirth CertificatesFetal MortalityBody HeightUmbilical CordHeart Rate, FetalHeadParityFetal MonitoringEchoencephalographyPregnancy TrimestersTripletsCongenital AbnormalitiesPregnancy, TwinPregnancy, MultipleMaternal ExposureMaternal-Fetal ExchangeNeonatal ScreeningPubic SymphysisPrenatal Exposure Delayed EffectsRegression AnalysisPerinatal MortalityLabor, ObstetricPregnancy in DiabeticsHypertension, Pregnancy-InducedPregnancy Complications, CardiovascularAbortion, SpontaneousAnthropometryUltrasonography, DopplerEnterocolitis, NecrotizingHernia, DiaphragmaticAmniocentesisInfant, Postmature