Umbilical CordFetal BloodPlacentaSpinal CordSpinal Cord InjuriesBlood BanksInfant, NewbornAntigens, CD34Hematopoietic Stem CellsPregnancyMaternal-Fetal ExchangeSpinal Cord DiseasesSpinal Cord CompressionHematopoietic Stem Cell TransplantationSpermatic CordCells, CulturedSpinal Cord IschemiaSpinal Cord NeoplasmsCell DifferentiationCord Blood Stem Cell TransplantationMice, SCIDColony-Forming Units AssayHistocompatibility TestingBlood PreservationCell SeparationMice, Inbred NODImmunophenotypingMaternal ExposureCell Culture TechniquesFlow CytometryAntigens, CDGraft vs Host DiseaseAntigens, CD38ADP-ribosyl CyclaseCord FactorsStem CellsBone Marrow CellsNuchal CordHematologic NeoplasmsTransplantation ConditioningParaplegiaBlood CellsCell LineageGestational AgeLeukocytes, MononuclearHematopoiesisStem Cell FactorGraft SurvivalVocal CordsBlood Cell CountTime FactorsTransplantation, HomologousAntigens, CD45Unrelated DonorsFetusTransplantation ChimeraDirected Tissue DonationNAD+ NucleosidaseSpinal Cord RegenerationDonor SelectionFetal Stem CellsTissue DonorsCryopreservationHLA AntigensAmniotic FluidErythroid Precursor CellsMesenchymal Stromal CellsT-LymphocytesTransplantation, HeterologousCoculture Techniques