Umbilical CordFetal BloodUmbilical ArteriesUmbilical VeinsArteriesCord Blood Stem Cell TransplantationSpinal CordSpinal Cord InjuriesPulmonary ArteryHernia, UmbilicalPregnancyCarotid ArteriesFemoral ArteryUrachal CystCerebral ArteriesRenal ArteryInfant, NewbornMesenteric ArteriesBlood BanksBasilar ArteryUltrasonography, PrenatalWharton JellyEndothelium, VascularHuman Umbilical Vein Endothelial CellsIliac ArteryVertebral ArteryCells, CulturedCoronary Artery BypassUmbilicusGestational AgeRadial ArteryMammary ArteriesMesenchymal Stromal CellsCarotid Artery, InternalSubclavian ArteryAntigens, CD34Carotid Artery DiseasesMaternal-Fetal ExchangePlacentaSplenic ArteryBrachial ArteryFetusHematopoietic Stem CellsUltrasonography, DopplerTime FactorsFetal HypoxiaHepatic ArteryCarotid Artery, CommonEndothelial CellsCoronary VesselsMiddle Cerebral ArteryCeliac ArteryOphthalmic ArteryMesenteric Artery, SuperiorCell DifferentiationPlacental CirculationThoracic ArteriesTreatment OutcomeRenal Artery ObstructionConstrictionFetal DiseasesUterine ArteryTemporal ArteriesFetal Growth RetardationUrachusSpinal Cord DiseasesBronchial ArteriesPopliteal ArteryMuscle, Smooth, VascularUltrasonography, Doppler, ColorUlnar ArteryStem CellsHeart Rate, FetalRegional Blood FlowSpinal Cord CompressionProspective StudiesCell Culture TechniquesNuchal CordCell SeparationVasodilationPregnancy Trimester, FirstCoronary AngiographyCarotid Artery, ExternalPregnancy OutcomeHematopoietic Stem Cell TransplantationSpermatic CordAmniotic FluidApgar ScoreAsphyxiaVasoconstrictionFetal DistressCesarean SectionArterial Occlusive DiseasesFlow CytometryAngiographyAntigens, CDDisease Models, AnimalCarotid Artery InjuriesMeconiumRetrospective Studies