Blood Chemical AnalysisBlood Gas AnalysisFetal BloodUmbilical CordCord Blood Stem Cell TransplantationCarbon DioxideBlood BanksOxygenAcid-Base ImbalanceUmbilical VeinsGasesPartial PressureUmbilical ArteriesInfant, NewbornAntigens, CD34CapnographyPulmonary Gas ExchangePregnancyHematopoietic Stem CellsSpinal CordBlood Gas Monitoring, TranscutaneousOximetryBlood Specimen CollectionRespiratory InsufficiencyHepatopulmonary SyndromeRespiratory Dead SpaceRespirationRespiratory Function TestsHypoventilationMaternal-Fetal ExchangeAcid-Base EquilibriumMethemoglobinemiaSpinal Cord InjuriesCells, CulturedVentilation-Perfusion RatioHematopoietic Stem Cell TransplantationOxygen ConsumptionAnoxiaHypercapniaBlood PreservationHernia, UmbilicalProspective StudiesMesenchymal Stromal CellsCell DifferentiationOxyhemoglobinsTime FactorsCell SeparationGraft vs Host DiseaseHydrogen-Ion ConcentrationRespiration, ArtificialCell Culture TechniquesHistocompatibility TestingOxygen Inhalation TherapyLungGestational AgeTransplantation ConditioningStem CellsNuchal CordAnesthesia, GeneralUrachal CystColony-Forming Units AssayAntigens, CDMice, SCIDPlacentaPulmonary EmbolismAntigens, CD38Radiography, ThoracicImmunophenotypingFlow CytometryFetusExercise TestLung DiseasesHematologic NeoplasmsHemodynamicsSpirometryMice, Inbred NODTreatment OutcomePulmonary Disease, Chronic ObstructiveAcute DiseasePositive-Pressure RespirationBicarbonatesDonor SelectionArteriesADP-ribosyl CyclaseUnrelated DonorsBlood Cell CountWharton JellyTransplantation, HomologousBone Marrow CellsVital CapacityRetrospective StudiesCell LineageGraft SurvivalHuman Umbilical Vein Endothelial CellsFetal Stem CellsBlood CellsForced Expiratory VolumeNAD+ NucleosidaseUltrasonography, PrenatalTransplantation Chimera