Fetal BloodUmbilical CordBone MarrowCord Blood Stem Cell TransplantationBone Marrow CellsBone Marrow TransplantationBlood BanksBone and BonesSpinal CordHematopoietic Stem CellsAntigens, CD34Umbilical VeinsInfant, NewbornUmbilical ArteriesSpinal Cord InjuriesPregnancyCells, CulturedCell DifferentiationHematopoietic Stem Cell TransplantationColony-Forming Units AssayGraft vs Host DiseaseBone RemodelingBone Marrow DiseasesHematopoiesisTransplantation, HomologousBone Marrow ExaminationCell SeparationMaternal-Fetal ExchangeFlow CytometryMesenchymal Stromal CellsBone Marrow NeoplasmsStem CellsHistocompatibility TestingImmunophenotypingAntigens, CDTransplantation ConditioningCell Culture TechniquesMice, SCIDBone DensityBlood PreservationCell LineageTransplantation ChimeraBlood Cell CountAntigens, CD38LeukemiaHematologic NeoplasmsGraft SurvivalBlood CellsMice, Inbred NODBone ResorptionTime FactorsADP-ribosyl CyclaseHernia, UmbilicalAnemia, AplasticStromal CellsGestational AgePlacentaBone Marrow PurgingFetusCoculture TechniquesNuchal CordWhole-Body IrradiationTissue DonorsStem Cell FactorUrachal CystUnrelated DonorsOsteogenesisHematologic DiseasesBone NeoplasmsMice, Inbred C57BLLeukocytes, MononuclearTransplantation, AutologousDonor SelectionCell ProliferationAntigens, CD45T-LymphocytesNAD+ NucleosidaseCell DivisionFetal Stem CellsEndothelial CellsBone DevelopmentErythroid Precursor CellsStem Cell TransplantationMegakaryocytesHLA AntigensCell CountTransplantation, HeterologousBone DiseasesCryopreservationTreatment OutcomeMaternal ExposureWharton JellyMyeloablative AgonistsHistocompatibilityGranulocytesAmniotic FluidBlood DonorsMesenchymal Stem Cell TransplantationHuman Umbilical Vein Endothelial CellsLeukemia, Myeloid, Acute