Umbilical CordPlacentaFetal BloodUmbilical VeinsUmbilical ArteriesCord Blood Stem Cell TransplantationSpinal CordPregnancyPlacenta DiseasesSpinal Cord InjuriesHernia, UmbilicalPlacenta PreviaPlacenta AccretaPlacenta, RetainedUrachal CystInfant, NewbornMaternal-Fetal ExchangeGestational AgeBlood BanksFetusUltrasonography, PrenatalWharton JellyTrophoblastsHuman Umbilical Vein Endothelial CellsUmbilicusCells, CulturedMesenchymal Stromal CellsAntigens, CD34Hematopoietic Stem CellsPlacental CirculationFetal Growth RetardationPre-EclampsiaPregnancy Trimester, FirstEndothelium, VascularChorionic VilliFetal HypoxiaPregnancy Trimester, ThirdCell DifferentiationAmniotic FluidEndothelial CellsCesarean SectionChorionPregnancy ProteinsFetal DiseasesPlacentationExtraembryonic MembranesUrachusPregnancy OutcomeSpinal Cord DiseasesStem CellsPregnancy Trimester, SecondChorioamnionitisCell SeparationAmnionUltrasonography, DopplerCell Culture TechniquesHeart Rate, FetalSpinal Cord CompressionNuchal CordDelivery, ObstetricTime FactorsPregnancy ComplicationsApgar ScoreFetal DevelopmentMeconiumFetal DistressAntigens, CDHematopoietic Stem Cell TransplantationImmunohistochemistryFlow CytometryAsphyxiaSpermatic CordConstrictionFetal DeathAllantoisUterusBirth WeightCoculture TechniquesLabor, ObstetricSpinal Cord NeoplasmsSheepBlood PreservationMaternal ExposureProlapseAborted FetusOligohydramniosCell ProliferationGraft vs Host DiseaseColony-Forming Units AssayNeovascularization, PhysiologicMice, SCIDPregnancy, AnimalImmunophenotypingReverse Transcriptase Polymerase Chain ReactionUltrasonography, Doppler, ColorBlood Flow VelocityMesenchymal Stem Cell TransplantationTransplantation ConditioningHistocompatibility TestingInfant, Newborn, Diseases