UltrasonographyPrenatal DiagnosisPrenatal Exposure Delayed EffectsPrenatal CareUltrasonography, PrenatalUltrasonography, Doppler, ColorPregnancyUltrasonography, DopplerFetal DiseasesSensitivity and SpecificityEndosonographyInfant, NewbornUltrasonography, Doppler, DuplexUltrasonography, Doppler, PulsedRetrospective StudiesUltrasonography, MammaryProspective StudiesGestational AgeTomography, X-Ray ComputedDelayed DiagnosisUltrasonography, InterventionalEarly DiagnosisPredictive Value of TestsAmniocentesisReproducibility of ResultsUltrasonography, Doppler, TranscranialChorionic Villi SamplingMagnetic Resonance ImagingFetusAbortion, EugenicPregnancy Trimester, SecondRisk FactorsSulfur HexafluorideMaternal ExposureFollow-Up StudiesContrast MediaPregnancy OutcomeDiagnostic ErrorsDiagnosisTime FactorsBiopsyImaging, Three-DimensionalPregnancy ComplicationsTreatment OutcomeCystsPregnancy Trimester, ThirdUrographyScrotumBiopsy, NeedleFalse Positive ReactionsAbnormalities, MultipleHydronephrosisCohort StudiesPregnancy Trimester, FirstBlood Flow VelocityPrenatal InjuriesCongenital AbnormalitiesFetal DevelopmentPrognosisAbortion, TherapeuticEchoencephalographyObserver VariationGenetic CounselingFatal OutcomeDiagnostic ImagingFetal DeathPalpationFalse Negative ReactionsDiagnosis, Computer-AssistedAbdomenBiopsy, Fine-NeedleFetal HeartPrevalenceAge FactorsAbortion, InducedBirth WeightOvarian CystsFetal Alcohol Spectrum DisordersLiver NeoplasmsGenetic TestingPreoperative CareThyroid NoduleIncidencePreimplantation DiagnosisPhysical ExaminationImage EnhancementVaginaMaternal-Fetal ExchangeROC CurveSeverity of Illness IndexCase-Control StudiesSyndromeHeterozygote DetectionCarotid Artery DiseasesPolyhydramniosNursing DiagnosisChromosome DisordersPolymerase Chain ReactionGallbladderBiological Markers