Umbilical CordFetal BloodUmbilical ArteriesUmbilical VeinsCordocentesisPregnancyCord Blood Stem Cell TransplantationFetusSpinal CordMaternal-Fetal ExchangeFetal DiseasesPlacentaBlood Transfusion, IntrauterineGestational AgeSpinal Cord InjuriesFetomaternal TransfusionFetal HypoxiaHeart Rate, FetalAmniotic FluidInfant, NewbornUltrasonography, PrenatalHernia, UmbilicalFetoscopyErythroblastosis, FetalRh IsoimmunizationUrachal CystPrenatal DiagnosisSheepPlacental CirculationFetal Growth RetardationBlood BanksHydrops FetalisBlood Specimen CollectionWharton JellyPregnancy Trimester, ThirdHuman Umbilical Vein Endothelial CellsHematopoietic Stem CellsPregnancy Trimester, SecondUmbilicusUltrasonography, DopplerFetal Stem CellsFetal DeathCells, CulturedMesenchymal Stromal CellsFetal WeightBlood Gas AnalysisCardiotocographyAntigens, CD34Labor, ObstetricPregnancy, AnimalPregnancy Trimester, FirstCesarean SectionBlood Flow VelocityFetal HeartFetofetal TransfusionEndothelium, VascularVitamin K Deficiency BleedingAnesthesia, ObstetricalFetal HemoglobinFetal DevelopmentEndothelial CellsAcidosisCell DifferentiationHemoglobinopathiesErythema InfectiosumUrachusPulsatile FlowSpinal Cord DiseasesEmbryonic and Fetal DevelopmentUterusAmniocentesisSpinal Cord CompressionNuchal CordStem CellsCell Culture TechniquesOxygenCell SeparationUltrasonographyRegional Blood FlowHematopoietic Stem Cell TransplantationChorionic VilliAsphyxiaApgar ScoreHematocritErythrocyte CountSpermatic CordMeconiumErythroblastsConstrictionPregnancy OutcomeFlow CytometryAntigens, CDFetal DistressTime FactorsSpinal Cord NeoplasmsDelivery, ObstetricCoculture TechniquesCarbon DioxideBlood PreservationProlapse