Congenital AbnormalitiesPrenatal DiagnosisAbortion, EugenicFetal DiseasesUltrasonography, PrenatalAmniocentesisPregnancyObstetric NursingPolyhydramniosFetusAmniotic FluidChromosome DisordersGestational Agealpha-FetoproteinsFetal DeathPregnancy Trimester, SecondPregnancy Trimester, FirstPregnancy OutcomeChromosome AberrationsPregnancy ComplicationsInfant, NewbornAbnormalities, MultipleEye AbnormalitiesKaryotypingMagnetic Resonance ImagingBrainCardiovascular AbnormalitiesCraniofacial AbnormalitiesSyndromeSkin AbnormalitiesPhenotypeUrogenital AbnormalitiesTrisomyMutationMusculoskeletal AbnormalitiesIn Situ Hybridization, FluorescenceTooth AbnormalitiesTranslocation, GeneticAneuploidyElectrocardiographyDisease Models, AnimalSex Chromosome AberrationsRetrospective StudiesAbnormalities, Drug-InducedCase-Control StudiesTime FactorsSchizophreniaPedigreeProspective StudiesCytogenetic AnalysisBrain DiseasesTomography, X-Ray ComputedMice, KnockoutChromosome DeletionHeart Defects, CongenitalSensitivity and SpecificityImage Processing, Computer-AssistedChromosome BandingFollow-Up StudiesCytogeneticsNervous System MalformationsEchocardiographyMice, TransgenicMice, Mutant StrainsPrognosisHomozygoteRisk FactorsMice, Inbred C57BLHeterozygoteIntellectual DisabilityChromosomes, Human, Pair 13Reference ValuesBiopsyPredictive Value of TestsAgenesis of Corpus CallosumDown SyndromeDigestive System AbnormalitiesElectroencephalographyAtrophyLimb Deformities, CongenitalMosaicismChromosomes, Human, Pair 11Neurologic ExaminationDiffusion Magnetic Resonance ImagingOcular Motility DisordersMyelodysplastic SyndromesAbnormal KaryotypeNerve Fibers, Myelinated