Blood BanksFetal BloodUmbilical CordBlood DonorsCord Blood Stem Cell TransplantationBlood Transfusion, AutologousDonor SelectionUmbilical VeinsOocyte DonationBlood TransfusionBlood SafetyUmbilical ArteriesAltruismInfant, NewbornAntigens, CD34PregnancyHematopoietic Stem CellsSpinal CordTissue and Organ ProcurementObstetric Surgical ProceduresTissue DonorsDirected Tissue DonationSpinal Cord InjuriesMaternal-Fetal ExchangeCells, CulturedHematopoietic Stem Cell TransplantationPlateletpheresisBlood PreservationHernia, UmbilicalMesenchymal Stromal CellsCell DifferentiationHistocompatibility TestingCell SeparationGraft vs Host DiseaseCell Culture TechniquesErythrocyte CountStem CellsTransplantation ConditioningPhlebotomyUrachal CystColony-Forming Units AssayAntigens, CDGestational AgeMice, SCIDPlacentaBrain DeathCompensation and RedressAntigens, CD38ImmunophenotypingFlow CytometryNuchal CordHematologic NeoplasmsBlood-Borne PathogensTime FactorsUnrelated DonorsBlood Loss, SurgicalMice, Inbred NODGraft SurvivalPreoperative CareBlood Cell CountTransplantation, HomologousADP-ribosyl CyclaseProspective StudiesMotivationFetusCryopreservationWharton JellyLiving DonorsBone Marrow CellsCell LineageIronFerritinsHuman Umbilical Vein Endothelial CellsFetal Stem CellsBlood CellsNAD+ NucleosidaseDeathUltrasonography, PrenatalTransplantation ChimeraUmbilicusHematopoiesisEndothelial CellsAmniotic FluidCoculture TechniquesRetrospective StudiesLeukocytes, MononuclearGift GivingInfant, PostmatureMyeloablative AgonistsNew England