Umbilical ArteriesUmbilical CordUmbilical VeinsFetal BloodSingle Umbilical ArteryUltrasonography, PrenatalPregnancyUltrasonography, DopplerFetal Growth RetardationPlacental CirculationArteriesCord Blood Stem Cell TransplantationGestational AgeHeart Rate, FetalBlood Flow VelocityHernia, UmbilicalSpinal CordInfant, NewbornFetal DistressFetusUltrasonography, Doppler, PulsedPulsatile FlowFetal MonitoringFetal DiseasesPlacental InsufficiencyPregnancy OutcomePlacentaUltrasonography, Doppler, ColorFetal HypoxiaSpinal Cord InjuriesCerebral ArteriesPregnancy Trimester, ThirdHuman Umbilical Vein Endothelial CellsEndothelium, VascularPulmonary ArteryUmbilicusMiddle Cerebral ArteryUrachal CystPregnancy Trimester, SecondCells, CulturedMaternal-Fetal ExchangeFetofetal TransfusionCarotid ArteriesFemoral ArteryApgar ScoreFetal HeartPre-EclampsiaBlood BanksUterine ArteryPregnancy Trimester, FirstRenal ArteryInfant, Small for Gestational AgeMesenteric ArteriesPregnancy, High-RiskWharton JellyEndothelial CellsPlacenta DiseasesFetal DeathProspective StudiesHallermann's SyndromeBasilar ArteryCesarean SectionRegional Blood FlowDigestive System AbnormalitiesUterusMesenchymal Stromal CellsOligohydramniosIliac ArteryChorionVertebral ArteryCoronary Artery BypassMuscle, Smooth, VascularBirth WeightAmniotic FluidAntigens, CD34Vascular ResistanceTime FactorsMammary ArteriesRadial ArteryFetal WeightCardiotocographyPregnancy ComplicationsCarotid Artery, InternalDelivery, ObstetricSubclavian ArteryHematopoietic Stem CellsAnesthesia, ObstetricalPregnancy Complications, CardiovascularReference ValuesUltrasonographySensitivity and SpecificityAbnormalities, MultiplePrenatal DiagnosisPregnancy, ProlongedMechanical PhenomenaCarotid Artery DiseasesFetal MovementDihydralazineSplenic ArteryInfant, Premature