TrisomyChromosomes, Human, 16-18Chromosomes, Human, 6-12 and XAbnormalities, MultipleKaryotypingChromosomes, Human, 13-15Down SyndromeChromosome BandingChromosomes, Human, 1-3Chromosome DisordersTranslocation, GeneticChromosomes, Human, 21-22 and YIntellectual DisabilityChromosomes, Human, 4-5DermatoglyphicsChromosomes, Human, Pair 21Chromosomes, Human, 19-20Chromosome AberrationsMonosomyChromosomes, Human, Pair 13In Situ Hybridization, FluorescencePrenatal DiagnosisPedigreeChromosomes, Human, Pair 5PhenotypeChromosomes, Human, Pair 9Chromosome InversionChromosomes, Human, Pair 18SyndromeChromosomes, Human, Pair 4Infant, NewbornChromosome DeletionChromosomes, Human, Pair 22Chromosomes, Human, Pair 11Chromosomes, Human, Pair 2FaceMosaicismComparative Genomic HybridizationNuchal Translucency MeasurementHeart Defects, CongenitalChorionic Gonadotropin, beta Subunit, HumanNondisjunction, GeneticPregnancy Trimester, FirstUltrasonography, PrenatalMaternal AgeChromosome MappingFetal DiseasesPregnancy-Associated Plasma Protein-APregnancy Trimester, SecondPregnancyNasal BoneAneuploidyPregnancy, High-RiskAmniocentesisCrown-Rump LengthChromosomes, Human, Pair 8