ColorEchocardiography, DopplerUltrasonography, Doppler, ColorEchocardiography, Doppler, ColorBlood Flow VelocityUltrasonography, DopplerMitral Valve InsufficiencyColor PerceptionHeart Septal Defects, VentricularTricuspid Valve InsufficiencyHeart ValvesHeart Valve DiseasesDoppler EffectMitral ValveModels, CardiovascularUltrasonography, Doppler, PulsedCoronary Vessel AnomaliesUltrasonographyEchocardiographyCardiac CatheterizationCoronary CirculationRegional Blood FlowColor VisionEchocardiography, Doppler, PulsedUltrasonography, Doppler, TranscranialColor Perception TestsPulmonary ArteryColor Vision DefectsHeart DiseasesHair ColorInfant, NewbornLaser-Doppler FlowmetryEye ColorPigmentationUltrasonography, PrenatalPulsatile FlowUmbilical ArteriesDiastoleSensitivity and SpecificityPlacental CirculationReproducibility of ResultsProspective StudiesOphthalmic ArteryPregnancyUltrasonography, Doppler, DuplexProsthesis ColoringColorimetryObserver VariationFetal Growth RetardationSkin PigmentationVentricular Function, LeftLightingSystoleMiddle Cerebral ArteryVascular ResistanceCerebrovascular CirculationPredictive Value of TestsHemodynamicsFetal HeartRheologyArteriesGestational AgeUltrasonicsUterine ArteryUterusAdnexa UteriVentricular Dysfunction, LeftEchoencephalographyContrast MediaFetal DiseasesCerebral ArteriesPhotic StimulationPregnancy Trimester, SecondImaging, Three-DimensionalRetinal Cone Photoreceptor CellsStroke VolumeBlood PressureTime FactorsFeathersImage EnhancementContrast SensitivityHeart Rate, FetalReference ValuesAngiographyEchocardiography, TransesophagealVentricular Function, RightCardiac OutputImage Interpretation, Computer-AssistedHeart VentriclesMyocardial ContractionFetal MonitoringMicrocirculationImage Processing, Computer-AssistedFeasibility StudiesPre-EclampsiaPigments, BiologicalPregnancy Trimester, ThirdPsychophysicsArterial Occlusive DiseasesTricuspid Valve