Ultrasonography, DopplerUltrasonographyUltrasonography, Doppler, ColorUltrasonography, Doppler, PulsedDoppler EffectUltrasonography, Doppler, TranscranialUltrasonography, PrenatalBlood Flow VelocityEchocardiography, Doppler, PulsedEchocardiography, Doppler, ColorUltrasonography, Doppler, DuplexSensitivity and SpecificityReproducibility of ResultsProspective StudiesEndosonographyRisk AssessmentLaser-Doppler FlowmetryUltrasonography, InterventionalPregnancyPulsatile FlowPredictive Value of TestsObserver VariationUltrasonography, MammaryRegional Blood FlowUmbilical ArteriesContrast MediaTomography, X-Ray ComputedImaging, Three-DimensionalSulfur HexafluorideFetal DiseasesGestational AgeRetrospective StudiesDiastoleTreatment OutcomeEchoencephalographyTime FactorsPlacental CirculationFollow-Up StudiesMagnetic Resonance ImagingSeverity of Illness IndexCerebrovascular CirculationImage EnhancementEchocardiographyInfant, NewbornUterusUltrasonicsFetal HeartFetal Growth RetardationCarotid Artery DiseasesReference ValuesMitral ValveMiddle Cerebral ArteryPregnancy Trimester, SecondAngiographyVascular ResistanceScrotumHemodynamicsFeasibility StudiesRisk FactorsPreoperative CareSystoleArteriesUrographyROC CurveOphthalmic ArteryVentricular Function, LeftCarotid ArteriesOvarian CystsCerebral ArteriesNursing AssessmentBlood PressureCoronary CirculationCystsPregnancy Trimester, ThirdPortal VeinVaginaPalpationCarotid StenosisImage Interpretation, Computer-AssistedMetacarpophalangeal JointTransducersAbdomenTesticular DiseasesPregnancy Trimester, FirstRheologyImage Processing, Computer-AssistedOutcome Assessment (Health Care)Ventricular Dysfunction, LeftEvaluation Studies as TopicDiagnostic ImagingArterial Occlusive DiseasesStatistics, NonparametricPilot ProjectsFetusFalse Positive ReactionsHeart Rate, FetalAdnexa UteriPrognosisAuscultationUterine Artery