Umbilical CordCalcium PhosphatesBone CementsTissue ScaffoldsFetal BloodStem CellsSpinal CordSpinal Cord InjuriesCord Blood Stem Cell TransplantationHematopoietic Stem CellsUmbilical VeinsUmbilical ArteriesStem Cell TransplantationEmbryonic Stem CellsHematopoietic Stem Cell TransplantationAdult Stem CellsCell DifferentiationPregnancyBlood BanksMesenchymal Stromal CellsInfant, NewbornPluripotent Stem CellsAntigens, CD34Cells, CulturedStem Cell NicheMesenchymal Stem Cell TransplantationInduced Pluripotent Stem CellsNeural Stem CellsStem Cell FactorMultipotent Stem CellsHernia, UmbilicalCell LineageSpinal Cord DiseasesUrachal CystFetal Stem CellsCell Culture TechniquesSpinal Cord CompressionCell SeparationMaternal-Fetal ExchangeCell ProliferationBone Marrow CellsFlow CytometryWharton JellySpermatic CordGestational AgeColony-Forming Units AssayFetusMice, SCIDSpinal Cord NeoplasmsHematopoiesis