Bone Marrow CellsFetal BloodUmbilical CordBone MarrowCord Blood Stem Cell TransplantationBone Marrow TransplantationHematopoietic Stem CellsRegistriesTissue DonorsHematopoietic Stem Cell TransplantationBone and BonesAntigens, CD34Transplantation, HomologousBlood BanksCells, CulturedHematopoiesisColony-Forming Units AssayCell DifferentiationUmbilical VeinsDonor SelectionHistocompatibility TestingUmbilical ArteriesInfant, NewbornGraft vs Host DiseasePregnancyFlow CytometryHematopoietic Stem Cell MobilizationGranulocyte Colony-Stimulating FactorCell SeparationSpleenMice, Inbred C57BLBone Marrow DiseasesSpinal CordT-LymphocytesLeukemiaBone RemodelingTransplantation ConditioningStem CellsBone Marrow ExaminationTime FactorsAntigens, CDGranulocytesCell LineageLymphocytesRadiation ChimeraTransplantation ChimeraWhole-Body IrradiationBone Marrow NeoplasmsBlood CellsGraft SurvivalMesenchymal Stromal CellsBlood DonorsCell DivisionImmunophenotypingStem Cell FactorInterleukin-3Hematologic NeoplasmsCell Culture TechniquesMice, SCIDStromal CellsBone ResorptionMegakaryocytesTransplantation, AutologousBlood Cell CountBone DensityAnemia, AplasticRetroviridaeSpinal Cord InjuriesAntigens, CD38Hematopoietic SystemMaternal-Fetal ExchangeMice, Inbred NODHematopoietic Cell Growth FactorsLeukemia, Myeloid, AcuteBone Marrow PurgingErythroid Precursor CellsADP-ribosyl CyclaseCoculture TechniquesTreatment OutcomeAntigens, CD45Cell ProliferationCell CountGranulocyte-Macrophage Colony-Stimulating FactorFetusOsteogenesisBlood PreservationHernia, UmbilicalMice, Inbred BALB CThymus GlandVolunteersCell LineColony-Stimulating FactorsRNA, MessengerOsteoclastsB-LymphocytesHematologic DiseasesCell SurvivalUnrelated DonorsMice, KnockoutErythropoiesis