Umbilical ArteriesPlacentaSingle Umbilical ArteryUltrasonography, PrenatalFetal Growth RetardationPregnancyUmbilical VeinsUltrasonography, DopplerPlacental CirculationArteriesGestational AgeHeart Rate, FetalBlood Flow VelocityPlacenta DiseasesUmbilical CordUltrasonography, Doppler, PulsedFetal DistressFetusPulsatile FlowPlacental InsufficiencyFetal MonitoringPregnancy Trimester, ThirdFetal DiseasesCerebral ArteriesFetal BloodPregnancy OutcomeUltrasonography, Doppler, ColorInfant, NewbornPulmonary ArteryPlacenta PreviaPlacenta AccretaMiddle Cerebral ArteryPre-EclampsiaPregnancy Trimester, SecondPlacenta, RetainedCarotid ArteriesMaternal-Fetal ExchangeUterine ArteryFetal HypoxiaFemoral ArteryRenal ArteryHernia, UmbilicalMesenteric ArteriesFetofetal TransfusionPregnancy Trimester, FirstFetal HeartBasilar ArteryFetal DeathUterusHallermann's SyndromeEndothelium, VascularPregnancy, High-RiskInfant, Small for Gestational AgeChorionTrophoblastsApgar ScoreDigestive System AbnormalitiesRegional Blood FlowIliac ArteryProspective StudiesCesarean SectionVertebral ArteryCoronary Artery BypassRadial ArteryMammary ArteriesVascular ResistanceCardiotocographyMuscle, Smooth, VascularHuman Umbilical Vein Endothelial CellsCarotid Artery, InternalSubclavian ArteryFetal WeightUmbilicusCells, CulturedCarotid Artery DiseasesPregnancy ComplicationsSplenic ArteryBrachial ArteryAbnormalities, MultiplePregnancy, ProlongedChorionic VilliUltrasonographyFetal DevelopmentBirth WeightDihydralazineReference ValuesPrenatal DiagnosisHepatic ArteryAmniotic FluidCarotid Artery, CommonEndothelial CellsPregnancy in DiabeticsCardiovascular AbnormalitiesLaser-Doppler FlowmetryCoronary VesselsPregnancy Complications, CardiovascularFetal MovementOligohydramniosBlood CirculationSensitivity and Specificity