Cord Blood Stem Cell TransplantationFetal BloodPenile ImplantationUmbilical CordHematopoietic Stem Cell TransplantationBlood BanksGraft vs Host DiseaseHematologic NeoplasmsTransplantation ConditioningTransplantation ChimeraHistocompatibility TestingHematopoietic Stem CellsTransplantation, HomologousAntigens, CD34Tissue DonorsUmbilical VeinsMonocrotophosStem CellsUmbilical ArteriesInfant, NewbornPregnancySpinal CordCells, CulturedTreatment OutcomePeripheral Blood Stem Cell TransplantationCell DifferentiationMice, SCIDMice, Inbred NODSpinal Cord InjuriesMaternal-Fetal ExchangeGraft SurvivalMesenchymal Stromal CellsCell SeparationBlood PreservationHernia, UmbilicalColony-Forming Units AssayTransplantation, AutologousCell Culture Techniques