UltrasonicsUltrasonography, PrenatalUltrasonic TherapyMicrobubblesPrenatal DiagnosisFetal DiseasesPregnancyUltrasonographySonicationPrenatal Exposure Delayed EffectsPelvimetrySulfur HexafluoridePrenatal CareHigh-Intensity Focused Ultrasound AblationPolyhydramniosSoundTransducersGestational AgePregnancy Trimester, SecondGastroschisisInfant, NewbornAbnormalities, MultipleOligohydramniosAcousticsCongenital AbnormalitiesAmniotic Band SyndromeFluorocarbonsEchoencephalographyContrast MediaPregnancy Trimester, ThirdAmniocentesisPregnancy OutcomeAutopsyHernia, UmbilicalUltrasonography, Doppler, ColorSpinal DysraphismAbortion, InducedHydronephrosisFetusPulseFetal DeathFetal HeartDilatation, PathologicUltrasonography, DopplerSensitivity and SpecificityRetrospective StudiesUltrasonography, InterventionalHeart Defects, CongenitalProspective StudiesSyndromeKaryotypingEndosonographyMagnetic Resonance ImagingUltrasonography, Doppler, DuplexUltrasonography, Doppler, PulsedUltrasonography, MammaryMaternal ExposureChorionic Villi SamplingReproducibility of ResultsImaging, Three-DimensionalAbortion, EugenicPregnancy ComplicationsUltrasonography, Doppler, TranscranialFetal DevelopmentPregnancy Trimester, FirstPredictive Value of TestsBlood Flow VelocityPrenatal InjuriesTomography, X-Ray ComputedTime FactorsBirth WeightRisk FactorsAbortion, TherapeuticMaternal-Fetal ExchangeImage EnhancementMaternal-Fetal RelationsPulse Therapy, DrugFetal Alcohol Spectrum DisordersFollow-Up StudiesMicroscopy, AcousticGenetic CounselingObserver VariationPalpationPulsatile FlowMaternal AgeDown SyndromeCystsScrotumCarotid ArteriesPregnant WomenTreatment OutcomeImage Interpretation, Computer-AssistedAbdomenChromosome DisordersUrographyCarotid Artery DiseasesPregnancy, High-RiskMothersPhantoms, ImagingCohort Studies