Congenital AbnormalitiesUltrasonography, PrenatalPolyhydramniosFetal DiseasesPregnancyPregnancy Trimester, SecondAbortion, InducedAmniocentesisFetal DeathGestational AgePrenatal DiagnosisFetoscopesAbnormalities, MultiplePregnancy Trimester, FirstFetusTrisomyChromosome DisordersPregnancy OutcomeDown SyndromeEbstein AnomalyHeart Defects, CongenitalKaryotypingInfant, NewbornChromosome AberrationsRetrospective StudiesCoronary Vessel AnomaliesSensitivity and SpecificityPelger-Huet AnomalyUrogenital AbnormalitiesProspective StudiesTooth AbnormalitiesSyndromeAnus, ImperforateVascular MalformationsColobomaAbnormalities, Drug-InducedCardiovascular AbnormalitiesMusculoskeletal AbnormalitiesAbortion, EugenicCleft LipHand Deformities, CongenitalCleft PalateUrinary TractDiGeorge SyndromeAnodontiaFoot Deformities, CongenitalLimb Deformities, CongenitalMullerian DuctsHoloprosencephalyFaciesIntellectual DisabilitySyndactylyHypertelorismEsophageal AtresiaTooth Eruption, EctopicHypospadiasMouth AbnormalitiesKlippel-Feil SyndromeAgenesis of Corpus CallosumFused TeethChoanal AtresiaTracheoesophageal FistulaHydronephrosisTomography, X-Ray ComputedLymphatic AbnormalitiesNervous System MalformationsSitus InversusDens in DenteAnophthalmosArteriovenous MalformationsGoldenhar SyndromePhenotypeHemangiomaPedigreeChoristomaHernia, DiaphragmaticRibsMicrophthalmosEctromeliaAbortion, TherapeuticTruncus Arteriosus, PersistentTooth, SupernumeraryHernia, UmbilicalChromosome DeletionFetal HeartMicrognathismTooth CrownSex Chromosome AberrationsAortic Arch SyndromesAnterior Eye SegmentMagnetic Resonance ImagingHeterotaxy SyndromeToesAniridiaDandy-Walker SyndromeCraniosynostosesNeurocutaneous SyndromesVena Cava, SuperiorMicrocephalyTwins, Conjoined