RegistriesFetal BloodTissue DonorsUmbilical CordHistocompatibility TestingCord Blood Stem Cell TransplantationTissue and Organ ProcurementHLA AntigensHematopoietic Stem Cell TransplantationBlood BanksHematopoietic Stem CellsDonor SelectionUmbilical VeinsAntigens, CD34Umbilical ArteriesTransplantation, HomologousInfant, NewbornBlood DonorsPregnancyCells, CulturedSpinal CordLiving DonorsHematopoietic Stem Cell MobilizationGraft vs Host DiseaseCell DifferentiationTransplantation ConditioningHematopoiesisGranulocyte Colony-Stimulating FactorBone Marrow CellsHematologic NeoplasmsColony-Forming Units AssayMaternal-Fetal ExchangeSpinal Cord InjuriesTime FactorsLymphocytesT-LymphocytesCell SeparationGraft SurvivalFlow CytometryMesenchymal Stromal CellsAntigens, CDCell Culture TechniquesHernia, UmbilicalBlood PreservationVolunteersTreatment OutcomeMice, SCIDStem CellsCell LineageBlood CellsLeukemiaImmunophenotypingAntigens, CD38Mice, Inbred NODUnrelated DonorsSpleenGestational AgeUrachal CystADP-ribosyl CyclaseHematopoietic SystemPlacentaFetusTransplantation ChimeraMyeloablative AgonistsIncidenceRetrospective StudiesBlood Cell CountNuchal CordStem Cell FactorRisk FactorsCoculture TechniquesNAD+ NucleosidaseLeukocytes, MononuclearProspective StudiesCell DivisionInterleukin-3Fetal Stem CellsWharton JellyEndothelial CellsBone Marrow TransplantationHematopoietic Cell Growth FactorsHistocompatibilityAntigens, CD45Hematologic DiseasesCryopreservationBone MarrowCell ProliferationHuman Umbilical Vein Endothelial CellsErythroid Precursor CellsUltrasonography, PrenatalFollow-Up StudiesTransplantation, HeterologousWhole-Body IrradiationCohort StudiesUmbilicusCell LineAmniotic FluidChimerismStem Cell TransplantationEndothelium, Vascular