Fetal BloodUmbilical CordCord Blood Stem Cell TransplantationBlood BanksUmbilical VeinsUmbilical ArteriesInfant, NewbornAntigens, CD34PregnancyHematopoietic Stem CellsSpinal CordHematopoietic Stem Cell TransplantationSpinal Cord InjuriesMaternal-Fetal ExchangeCells, CulturedHernia, UmbilicalMesenchymal Stromal CellsCell DifferentiationBlood PreservationGraft vs Host DiseaseTransplantation ConditioningCell SeparationHistocompatibility TestingCell Culture TechniquesStem CellsColony-Forming Units AssayUrachal CystAntigens, CDGestational AgeMice, SCIDPlacentaFlow CytometryImmunophenotypingAntigens, CD38Hematologic NeoplasmsNuchal CordMice, Inbred NODTransplantation, HomologousDonor SelectionBlood Cell CountUnrelated DonorsADP-ribosyl CyclaseFetusWharton JellyGraft SurvivalBone Marrow CellsCell LineageHuman Umbilical Vein Endothelial CellsBlood CellsTransplantation ChimeraFetal Stem CellsTime FactorsMyeloablative AgonistsNAD+ NucleosidaseTreatment OutcomeHematopoiesisUltrasonography, PrenatalEndothelial CellsLeukocytes, MononuclearUmbilicusAmniotic FluidCoculture TechniquesCryopreservationInfant, PostmatureHematologic DiseasesBlood DonorsLeukemiaMaternal ExposureStem Cell FactorTissue DonorsHLA AntigensTransplantation, HeterologousBlood Transfusion, AutologousEndothelium, VascularStem Cell TransplantationCell ProliferationLeukodystrophy, MetachromaticAntigens, CD45Cesarean SectionFetal HypoxiaFetal DiseasesN-Acetylgalactosamine-4-SulfataseInfant, PrematureCerebroside-SulfataseDelivery, ObstetricPenile ImplantationErythroid Precursor CellsAnemia, AplasticGranulocyte-Macrophage Progenitor CellsAllograftsBlood Specimen CollectionVidarabinePregnancy OutcomeCell DivisionTransplantsLiver ExtractsChimerismBiological MarkersBlood TransfusionBirth Weight