Fetal BloodSpinal CordSpinal Cord InjuriesGraft SurvivalUmbilical CordBlood BanksInfant, NewbornAntigens, CD34Hematopoietic Stem CellsGraft Occlusion, VascularPregnancyMaternal-Fetal ExchangeSpinal Cord DiseasesSpinal Cord CompressionHematopoietic Stem Cell TransplantationGraft vs Host DiseaseCells, CulturedSpermatic CordHistocompatibility TestingSpinal Cord IschemiaCell DifferentiationSpinal Cord NeoplasmsCord Blood Stem Cell TransplantationBlood Vessel ProsthesisMice, SCIDTime FactorsColony-Forming Units AssayMice, Inbred NODCell SeparationImmunophenotypingCell Culture TechniquesBlood PreservationFlow CytometryMaternal ExposureAntigens, CDPolytetrafluoroethyleneTreatment OutcomeAntigens, CD38TransplantsTransplantation ConditioningStem CellsHematologic NeoplasmsADP-ribosyl CyclaseCord FactorsParaplegiaPlacentaBone Marrow CellsNuchal CordHematopoiesisCell LineageBlood CellsLeukocytes, MononuclearGestational AgeTransplantation ChimeraStem Cell FactorFetal Tissue TransplantationCryopreservationBlood Cell CountTransplantation, HeterologousUnrelated DonorsVocal CordsVascular PatencyAntigens, CD45FetusHLA AntigensTransplantation, HomologousHistocompatibilityDirected Tissue DonationPolyethylene TerephthalatesSaphenous VeinT-LymphocytesKidney TransplantationBlood Vessel Prosthesis ImplantationRetrospective StudiesSpinal Cord RegenerationNAD+ NucleosidaseFetal Stem CellsDonor SelectionMesenchymal Stromal CellsTissue DonorsVeinsFollow-Up StudiesCoculture TechniquesAmniotic FluidPrimary Graft DysfunctionCervical VertebraeRecovery of FunctionErythroid Precursor CellsStem Cell TransplantationCytokinesLymphocyte ActivationCell ProliferationMotor NeuronsThrombopoietinGraft Enhancement, ImmunologicProspective StudiesLeukemiaBirth WeightLymphocytesPostoperative Complications