UltrasonographyUltrasonography, Doppler, ColorUltrasonography, DopplerUltrasonography, PrenatalPregnancyEndosonographyUltrasonography, Doppler, DuplexUltrasonography, Doppler, PulsedUltrasonography, MammaryFetal DiseasesUltrasonography, InterventionalPrenatal Exposure Delayed EffectsUltrasonography, Doppler, TranscranialSensitivity and SpecificityFetusGestational AgeSulfur HexafluorideProspective StudiesTomography, X-Ray ComputedMaternal ExposureContrast MediaInfant, NewbornFetal TherapiesMaternal-Fetal ExchangeBlood Flow VelocityReproducibility of ResultsUrographyImaging, Three-DimensionalPredictive Value of TestsRetrospective StudiesScrotumCystsUterusMagnetic Resonance ImagingEchoencephalographyPalpationFetal HeartAbdomenCarotid Artery DiseasesHydronephrosisVaginaPreoperative CareToe JointThyroid NoduleCarotid ArteriesOvarian CystsGallbladderFollow-Up StudiesMetacarpophalangeal JointImage EnhancementLiver NeoplasmsFetal DeathPregnancy Trimester, SecondObserver VariationPregnancy Trimester, ThirdAbdominal InjuriesSplenic DiseasesTesticular DiseasesFetal MovementEmbryonic and Fetal DevelopmentTreatment OutcomeRisk FactorsDiagnostic ImagingAuscultationTime FactorsGallbladder DiseasesAngiographyAbnormalities, Drug-InducedLymphangioma, CysticCarotid Artery, CommonTransducersBiliary Tract DiseasesPregnancy Trimester, FirstRectumBiopsy, NeedleFalse Positive ReactionsBiopsy, Fine-NeedleOvarian FollicleTunica MediaPrenatal DiagnosisUrologic DiseasesPregnancy ComplicationsTendinopathyCholecystographyPortal VeinTesticular HydrocelePregnancy OutcomeAnimals, NewbornGallbladder NeoplasmsSheepCholangiopancreatography, Endoscopic RetrogradePolypsUrinary TractRenal ColicPulsatile FlowIntraoperative CarePlacentaCarotid StenosisThyroid GlandCholangiopancreatography, Magnetic Resonance