TrisomyAbnormal KaryotypeKaryotypingKaryotypeChromosome AberrationsChromosome DisordersDown SyndromeAneuploidyCytogeneticsChromosome BandingUltrasonography, PrenatalSex Chromosome AberrationsTranslocation, GeneticChromosomes, Human, Pair 18MonosomyAbnormalities, MultipleIn Situ Hybridization, FluorescenceAmniocentesisCytogenetic AnalysisPregnancyPregnancy Trimester, FirstPrenatal DiagnosisAbortion, SpontaneousFetal DiseasesPregnancy Trimester, SecondMaternal AgeMosaicismNeckChromosomes, Human, Pair 8Chromosomes, Human, 16-18Myelodysplastic SyndromesGestational AgeChromosomes, Human, Pair 21Fetal DeathChromosomes, Human, Pair 13Leukemia, Myeloid, AcuteNuchal Translucency MeasurementChromosomes, Human, 6-12 and XTurner SyndromeChromosomes, Human, 13-15Pregnancy OutcomeInfertility, MaleNondisjunction, GeneticChorionic Gonadotropin, beta Subunit, HumanChromosomes, Human, 21-22 and YPrognosisInfant, NewbornXYY KaryotypeLeukemiaImmunophenotypingNasal BoneChorionic Villi SamplingPregnancy-Associated Plasma Protein-APregnancy, High-RiskRetrospective StudiesDermatoglyphicsChromosomes, Human, Pair 7Chromosomes, Human, 4-5Chromosomes, Human, Pair 12Crown-Rump LengthChromosomes, Human, 19-20Intellectual DisabilityChromosomes, Human, 1-3Chromosome PaintingChromosome DeletionChromosomesDiploidyChromosomes, Human, Pair 5Klinefelter SyndromeChromosome InversionRing ChromosomesIsochromosomesChromosomes, Human, Pair 11Chromosomes, HumanLeukemia, MyeloidSyndromeSex ChromosomesChromosomes, Human, Pair 22PhenotypeChromosomes, Human, Pair 9FetusChromosomes, Human, XSpectral KaryotypingSex ChromatinChromosomes, Human, Pair 16Chromosome MappingGenetic MarkersAbortion, EugenicChromosomes, Human, Pair 20Heart Defects, CongenitalAzure StainsChromosomes, Human, Pair 14Chromosomes, Human, YX Chromosome