Umbilical CordFetal BloodUmbilical VeinsUmbilical ArteriesCord Blood Stem Cell TransplantationStem CellsSpinal CordSpinal Cord InjuriesHematopoietic Stem CellsHernia, UmbilicalPregnancyBlood Transfusion, AutologousTransplantation, HomologousUrachal CystMesenchymal Stromal CellsCells, CulturedStem Cell TransplantationInfant, NewbornBlood BanksHematopoietic Stem Cell TransplantationMesenchymal Stem Cell TransplantationWharton JellyHuman Umbilical Vein Endothelial CellsUltrasonography, PrenatalCell DifferentiationUmbilicusPlant StemsAntigens, CD34Gestational AgeAdult Stem CellsFetusNeoplastic Stem CellsFlow CytometryCell SeparationMaternal-Fetal ExchangeGraft vs Host DiseasePlacentaCell ProliferationBlood TransfusionOperative Blood SalvagePluripotent Stem CellsTime FactorsEndothelium, VascularHost vs Graft ReactionFetal HypoxiaGraft SurvivalLymphocyte Culture Test, MixedCoculture TechniquesBlood Loss, SurgicalAntigens, CDEndothelial CellsBone Marrow TransplantationCell LineageMultipotent Stem CellsImmunophenotypingInduced Pluripotent Stem CellsBone Marrow CellsNeural Stem CellsStem Cell FactorFetal Stem CellsMouth FloorStem Cell NicheT-LymphocytesUrachusSpinal Cord DiseasesFetal DiseasesTranexamic AcidStenotrophomonasTissue PreservationAmniotic FluidColony-Forming Units AssayImmunohistochemistrySpinal Cord CompressionTransplantation ChimeraNuchal CordCell Culture TechniquesUltrasonography, DopplerMice, SCIDTissue DonorsBone TransplantationTransplantation, AutologousHeart Rate, FetalFetal Growth RetardationPlacental CirculationBrain StemLymphocyte ActivationMice, Inbred C57BLTreatment OutcomeAsphyxiaApgar ScoreDisease Models, AnimalBlood SubstitutesPregnancy Trimester, FirstSpermatic CordTransplantation ConditioningMeconiumGraft RejectionCesarean SectionPregnancy OutcomeConstriction