Fetal BloodHematopoietic Stem CellsUmbilical CordAntigens, CD34Cord Blood Stem Cell TransplantationColony-Forming Units AssayHematopoiesisBone Marrow CellsStem CellsCell DifferentiationCells, CulturedBlood BanksCell LineageStem Cell FactorBone MarrowUmbilical VeinsHematopoietic Stem Cell TransplantationInterleukin-3Antigens, CDFlow CytometryUmbilical ArteriesCell SeparationErythroid Precursor CellsInfant, NewbornMyeloid Progenitor CellsHematopoietic Cell Growth FactorsGranulocyte Colony-Stimulating FactorPregnancyHematopoietic Stem Cell MobilizationCell DivisionCell Culture TechniquesSpinal CordBlood Cell CountGranulocytesGranulocyte-Macrophage Progenitor CellsMice, SCIDCell ProliferationGranulocyte-Macrophage Colony-Stimulating FactorAntigens, CD38Blood CellsADP-ribosyl CyclaseProto-Oncogene Proteins c-kitMegakaryocytesMice, Inbred C57BLImmunophenotypingMesenchymal Stromal CellsStromal CellsMice, Inbred NODEndothelial CellsMultipotent Stem CellsThrombopoietinRecombinant ProteinsRetroviridaeChemokine CXCL12ErythropoiesisAntigens, DifferentiationTransduction, GeneticNAD+ NucleosidaseCell CountTime FactorsFetusStem Cell TransplantationSpinal Cord InjuriesCoculture TechniquesCell SurvivalErythropoietinMyelopoiesisMaternal-Fetal ExchangeCell MovementFetal Stem CellsGraft SurvivalLeukemiaGenetic VectorsLeukapheresisBlood PreservationCell LineAntigens, CD45Hematopoiesis, ExtramedullarySignal TransductionBone Marrow TransplantationColony-Stimulating FactorsCell AdhesionMice, KnockoutGraft vs Host DiseaseReverse Transcriptase Polymerase Chain ReactionHernia, UmbilicalTransplantation, HomologousTransplantation ConditioningLeukocytes, MononuclearTransplantation ChimeraGene Expression RegulationGrowth SubstancesApoptosisRNA, MessengerCryopreservationK562 CellsT-LymphocytesHematopoietic SystemHistocompatibility TestingCytokines