Umbilical CordFetal BloodSpinal CordSpinal Cord InjuriesInfant, NewbornUmbilical VeinsUmbilical ArteriesCord Blood Stem Cell TransplantationBlood BanksPregnancyAntigens, CD34Animals, NewbornHematopoietic Stem CellsMaternal-Fetal ExchangeHernia, UmbilicalCells, CulturedInfant, Newborn, DiseasesGestational AgeSpinal Cord DiseasesUrachal CystSpinal Cord CompressionCell DifferentiationHematopoietic Stem Cell TransplantationPlacentaFetusSpermatic CordMesenchymal Stromal CellsWharton JellySpinal Cord NeoplasmsCell SeparationCell Culture TechniquesSpinal Cord IschemiaHuman Umbilical Vein Endothelial CellsUltrasonography, PrenatalMice, SCIDFlow CytometryBlood PreservationStem CellsUmbilicusColony-Forming Units AssayAntigens, CDNuchal CordMaternal ExposureHistocompatibility TestingImmunophenotypingGraft vs Host DiseaseMice, Inbred NODTime FactorsAntigens, CD38Fetal HypoxiaNeonatal ScreeningTransplantation ConditioningAmniotic FluidCell LineageBone Marrow CellsBirth WeightInfant, PrematureADP-ribosyl CyclaseHematologic NeoplasmsCord FactorsEndothelial CellsEndothelium, VascularLeukocytes, MononuclearDelivery, ObstetricHematopoiesisBlood CellsMeconiumParaplegiaCoculture TechniquesApgar ScoreBlood Cell CountGraft SurvivalTransplantation, HomologousUnrelated DonorsCesarean SectionFetal DiseasesVocal CordsStem Cell FactorCell ProliferationFetal Stem CellsFetal Growth RetardationDonor SelectionPregnancy OutcomeTransplantation ChimeraAntigens, CD45NAD+ NucleosidasePregnancy Trimester, ThirdCryopreservationPregnancy ComplicationsBlood Specimen CollectionSpinal Cord RegenerationTransplantation, HeterologousStem Cell TransplantationHLA AntigensPrenatal Exposure Delayed EffectsConstrictionTissue DonorsInfant, Small for Gestational AgeUrachusBiological Markers