Fetal BloodUmbilical CordCord Blood Stem Cell TransplantationBlood BanksPregnancyUmbilical ArteriesUmbilical VeinsCordocentesisMaternal-Fetal ExchangeInfant, NewbornFetusAntigens, CD34Hematopoietic Stem CellsSpinal CordPlacentaGestational AgeFetal DiseasesAmniotic FluidBlood Transfusion, IntrauterineSpinal Cord InjuriesFetal HypoxiaCells, CulturedHematopoietic Stem Cell TransplantationFetomaternal TransfusionHeart Rate, FetalUltrasonography, PrenatalHernia, UmbilicalFetal Stem CellsErythroblastosis, FetalMesenchymal Stromal CellsCell DifferentiationFetoscopyBlood PreservationBlood Specimen CollectionRh IsoimmunizationCell SeparationGraft vs Host DiseaseCell Culture TechniquesHistocompatibility TestingTransplantation ConditioningPrenatal DiagnosisStem CellsUrachal CystColony-Forming Units AssayAntigens, CDMice, SCIDFetal Growth RetardationSheepAntigens, CD38ImmunophenotypingFlow CytometryNuchal CordPlacental CirculationHematologic NeoplasmsMice, Inbred NODHydrops FetalisPregnancy Trimester, ThirdDonor SelectionADP-ribosyl CyclaseUnrelated DonorsBlood Cell CountWharton JellyTransplantation, HomologousBone Marrow CellsCesarean SectionCell LineageGraft SurvivalHuman Umbilical Vein Endothelial CellsPregnancy Trimester, SecondBlood CellsNAD+ NucleosidaseTransplantation ChimeraUmbilicusHematopoiesisEndothelial CellsUltrasonography, DopplerCoculture TechniquesLeukocytes, MononuclearInfant, PostmatureCryopreservationFetal DeathMyeloablative AgonistsAnesthesia, ObstetricalBlood DonorsBlood Gas AnalysisMaternal ExposureLabor, ObstetricFetal WeightHematologic DiseasesStem Cell FactorTime FactorsLeukemiaHLA AntigensCardiotocographyPregnancy Trimester, FirstBlood Transfusion, AutologousEndothelium, VascularTissue DonorsTransplantation, HeterologousPregnancy, Animal