UltrasonicsUltrasonography, PrenatalUltrasonic TherapyMicrobubblesFetal DiseasesPrenatal DiagnosisPregnancyUltrasonographySonicationPrenatal Exposure Delayed EffectsPelvimetrySulfur HexafluoridePrenatal CareUltrasonography, DopplerUltrasonography, Doppler, ColorHigh-Intensity Focused Ultrasound AblationPolyhydramniosSoundTransducersGestational AgePregnancy Trimester, SecondGastroschisisInfant, NewbornAbnormalities, MultipleOligohydramniosAcousticsEchoencephalographyContrast MediaCongenital AbnormalitiesFluorocarbonsAmniotic Band SyndromeUltrasonography, Doppler, PulsedPregnancy Trimester, ThirdPregnancy OutcomeAmniocentesisAutopsyHernia, UmbilicalDoppler EffectSpinal DysraphismAbortion, InducedFetusFetal HeartUltrasonography, Doppler, TranscranialHydronephrosisSensitivity and SpecificityFetal DeathDilatation, PathologicBlood Flow VelocityRetrospective StudiesProspective StudiesUltrasonography, InterventionalHeart Defects, CongenitalEchocardiography, Doppler, PulsedEchocardiography, Doppler, ColorUltrasonography, Doppler, DuplexSyndromeEndosonographyMagnetic Resonance ImagingKaryotypingReproducibility of ResultsUltrasonography, MammaryImaging, Three-DimensionalMaternal ExposurePredictive Value of TestsChorionic Villi SamplingPulsatile FlowUmbilical ArteriesLaser-Doppler FlowmetryPregnancy Trimester, FirstAbortion, EugenicPregnancy ComplicationsRegional Blood FlowObserver VariationFetal DevelopmentFetal Growth RetardationTomography, X-Ray ComputedPrenatal InjuriesImage EnhancementTime FactorsFollow-Up StudiesBirth WeightRisk FactorsPlacental CirculationScrotumUterusEchocardiographyMaternal-Fetal ExchangeAbortion, TherapeuticPregnancy, High-RiskCarotid Artery DiseasesMaternal-Fetal RelationsCarotid ArteriesFetal Alcohol Spectrum DisordersTreatment OutcomeMicroscopy, AcousticCystsImage Interpretation, Computer-AssistedDown SyndromeOvarian CystsMaternal Age