Prenatal Exposure Delayed EffectsPrenatal DiagnosisUltrasonography, PrenatalPrenatal CarePregnancyFetal DiseasesUltrasonographyUltrasonography, Doppler, ColorGestational AgePregnancy Trimester, SecondUltrasonography, MammaryInfant, NewbornSensitivity and SpecificityPregnancy Trimester, ThirdEchoencephalographyAmniocentesisPregnancy Trimester, FirstPregnancy OutcomeUltrasonography, DopplerAbortion, EugenicAbnormalities, MultipleFetusFetal WeightPlacenta, RetainedRetrospective StudiesCystsReproducibility of ResultsDown SyndromeChorionic Villi SamplingAbortion, TherapeuticMaternal ExposurePregnancy ComplicationsProspective StudiesOvarian CystsTrisomyImaging, Three-DimensionalHydronephrosisPlacenta AccretaFetal HeartPregnancy, High-RiskNeckFetal DeathTorsion AbnormalityBirth WeightUmbilical CordCongenital AbnormalitiesTesticular DiseasesPolyhydramniosFetal DevelopmentCesarean SectionAbortion, InducedUterine Cervical IncompetenceOvarian DiseasesPrenatal InjuriesEpidermal CystCervix UteriMaternal AgePredictive Value of TestsObstetric Labor, PrematureUterine HemorrhageScrotumChromosome DisordersOligohydramniosImage EnhancementHernia, UmbilicalAbdomenAbortion, IncompleteAdnexal DiseasesUltrasonography, Doppler, PulsedPalpationDilatation, PathologicBiometryHydrops FetalisFetal Alcohol Spectrum DisordersAnus, ImperforateMaternal-Fetal ExchangeUltrasonography, InterventionalDandy-Walker SyndromeContrast MediaAdnexa UteriChromosomes, Human, Pair 18Spermatic Cord TorsionFetal Growth RetardationObserver VariationUterusVaginaBreast DiseasesUterine DiseasesGenetic CounselingEmbryonic and Fetal DevelopmentThyroid NoduleFetal MacrosomiaPlacenta PreviaCervical Length MeasurementCervical RipeningPlacenta DiseasesKaryotypingPregnancy, ProlongedImage Interpretation, Computer-AssistedUterine Neoplasms