Fetal BloodUmbilical CordUmbilical ArteriesCord Blood Stem Cell TransplantationUmbilical VeinsPregnancyUltrasonography, PrenatalFetusBlood BanksUltrasonography, DopplerInfant, NewbornAntigens, CD34Hematopoietic Stem CellsSpinal CordBlood Flow VelocitySpinal Cord InjuriesMaternal-Fetal ExchangeCells, CulturedHematopoietic Stem Cell TransplantationHernia, UmbilicalMesenchymal Stromal CellsCell DifferentiationBlood PreservationCell SeparationGraft vs Host DiseaseCell Culture TechniquesHistocompatibility TestingTransplantation ConditioningStem CellsUrachal CystColony-Forming Units AssayAntigens, CDGestational AgeMice, SCIDPlacentaAntigens, CD38ImmunophenotypingFlow CytometryNuchal CordHematologic NeoplasmsMice, Inbred NODDonor SelectionADP-ribosyl CyclaseUnrelated DonorsBlood Cell CountWharton JellyTransplantation, HomologousBone Marrow CellsCell LineageGraft SurvivalHuman Umbilical Vein Endothelial CellsFetal Stem CellsBlood CellsNAD+ NucleosidaseTransplantation ChimeraUmbilicusHematopoiesisEndothelial CellsAmniotic FluidCoculture TechniquesLeukocytes, MononuclearInfant, PostmatureCryopreservationMyeloablative AgonistsBlood DonorsMaternal ExposureHematologic DiseasesStem Cell FactorTime FactorsLeukemiaHLA AntigensBlood Transfusion, AutologousEndothelium, VascularTissue DonorsTransplantation, HeterologousLeukodystrophy, MetachromaticCell ProliferationAntigens, CD45Stem Cell TransplantationCesarean SectionFetal HypoxiaFetal DiseasesN-Acetylgalactosamine-4-SulfataseCerebroside-SulfataseInfant, PrematureDelivery, ObstetricPenile ImplantationErythroid Precursor CellsGranulocyte-Macrophage Progenitor CellsAllograftsBlood Specimen CollectionAnemia, AplasticPregnancy OutcomeLiver ExtractsCell DivisionTransplantsChimerismBirth WeightBlood TransfusionBiological Markers