Fetal BloodUmbilical CordCord Blood Stem Cell TransplantationMothersBlood BanksUmbilical VeinsUmbilical ArteriesInfant, NewbornPregnancyAntigens, CD34Hematopoietic Stem CellsSpinal CordMaternal-Fetal ExchangeSpinal Cord InjuriesCells, CulturedHematopoietic Stem Cell TransplantationHernia, UmbilicalMesenchymal Stromal CellsCell DifferentiationBlood PreservationCell SeparationGraft vs Host DiseaseCell Culture TechniquesHistocompatibility TestingGestational AgeTransplantation ConditioningStem CellsPlacentaUrachal CystColony-Forming Units AssayAntigens, CDMice, SCIDAntigens, CD38ImmunophenotypingFlow CytometryNuchal CordFetusHematologic NeoplasmsMice, Inbred NODDonor SelectionADP-ribosyl CyclaseBlood Cell CountUnrelated DonorsWharton JellyTransplantation, HomologousBone Marrow CellsCell LineageGraft SurvivalHuman Umbilical Vein Endothelial CellsFetal Stem CellsMaternal ExposureBlood CellsAmniotic FluidUltrasonography, PrenatalNAD+ NucleosidaseUmbilicusTransplantation ChimeraEndothelial CellsHematopoiesisLeukocytes, MononuclearCoculture TechniquesInfant, PostmatureCryopreservationTime FactorsMyeloablative AgonistsBlood DonorsCesarean SectionHematologic DiseasesStem Cell FactorLeukemiaInfant, PrematureDelivery, ObstetricHLA AntigensBirth WeightFetal DiseasesBlood Transfusion, AutologousTissue DonorsEndothelium, VascularTransplantation, HeterologousPregnancy OutcomeCell ProliferationLeukodystrophy, MetachromaticPrenatal Exposure Delayed EffectsAntigens, CD45Fetal HypoxiaStem Cell TransplantationN-Acetylgalactosamine-4-SulfataseInfectious Disease Transmission, VerticalCerebroside-SulfatasePenile ImplantationPregnancy Complications, InfectiousErythroid Precursor CellsGranulocyte-Macrophage Progenitor CellsAllograftsBlood Specimen CollectionChimerismCell DivisionAnemia, AplasticMother-Child RelationsLiver Extracts