Fetal BloodUmbilical CordSpinal CordCord Blood Stem Cell TransplantationSpinal Cord InjuriesBlood BanksInfant, NewbornPregnancyAntigens, CD34Maternal-Fetal ExchangeUmbilical VeinsHematopoietic Stem CellsUmbilical ArteriesCells, CulturedMethylmercury CompoundsHematopoietic Stem Cell TransplantationMaternal ExposureCell DifferentiationBlood PreservationCell SeparationCell Culture TechniquesGraft vs Host DiseaseHistocompatibility TestingColony-Forming Units AssayMice, SCIDMesenchymal Stromal CellsSpinal Cord DiseasesStem CellsAntigens, CDImmunophenotypingTransplantation ConditioningNuchal CordFlow CytometryAntigens, CD38Rats, Sprague-DawleyGestational AgePlacentaDisease Models, AnimalSpinal Cord CompressionMice, Inbred NODAmyotrophic Lateral SclerosisHematologic NeoplasmsRecovery of FunctionInjections, SpinalHernia, UmbilicalADP-ribosyl CyclaseMotor NeuronsSpermatic CordBone Marrow CellsFetusBlood Cell CountCell LineageUnrelated DonorsDonor SelectionTransplantation, HomologousNerve RegenerationBlood CellsGraft SurvivalSpinal Cord NeoplasmsUrachal CystSpinal Cord IschemiaHematopoiesisLeukocytes, MononuclearTime FactorsFetal Stem CellsNAD+ NucleosidaseTransplantation ChimeraAmniotic FluidStem Cell FactorCryopreservationCoculture TechniquesNeuronsWharton JellyAntigens, CD45Blood DonorsHLA AntigensTissue DonorsMyeloablative AgonistsTransplantation, HeterologousEndothelial CellsLeukemiaInfant, PostmatureCell ProliferationHematologic DiseasesStem Cell TransplantationHuman Umbilical Vein Endothelial CellsSuperoxide DismutaseCord FactorsErythroid Precursor CellsUltrasonography, PrenatalInfant, PrematureBlood Transfusion, AutologousDelivery, ObstetricAllograftsBirth WeightFetal HypoxiaCesarean SectionParaplegiaBlood Specimen CollectionUmbilicus