Sex ChromosomesTrisomySex Chromosome AberrationsChromosomesChromosome MappingX ChromosomeChromosomes, Human, Pair 13Sex Chromosome DisordersChromosomes, Human, Pair 18Chromosome AberrationsY ChromosomeKaryotypingAneuploidyChromosomes, Human, Pair 21Chromosome BandingChromosome DisordersChromosomes, Human, XDown SyndromeIn Situ Hybridization, FluorescenceNondisjunction, GeneticChromosomes, Human, YSex Determination ProcessesChromosomes, HumanChromosome PairingChromosomes, PlantSileneTurner SyndromeChromosomes, Human, 16-18MeiosisX Chromosome InactivationChromosome SegregationMosaicismChromosomes, Human, Pair 1Genes, Y-LinkedChromosomes, Human, 13-15Genes, X-LinkedChromosome PaintingChromosomes, Artificial, BacterialChromosomes, BacterialPlatypusChromosomes, InsectSex CharacteristicsChromosomes, Human, Pair 7Chromosomes, Human, Pair 11Chromosomes, Human, Pair 17Sex ChromatinChromosome DeletionKlinefelter SyndromeChromosomes, FungalChromosomes, Human, Pair 6Chromosomes, Human, Pair 15XYY KaryotypeChromosomes, MammalianChromosomes, Human, Pair 9Translocation, GeneticSpermatocytesPrenatal DiagnosisGenes, sryPachytene StageChromosome StructuresChromosomes, Human, 6-12 and XGenetic LinkageNuchal Translucency MeasurementEvolution, MolecularDosage Compensation, GeneticDiploidyChromosomes, Human, Pair 2Chromosomes, Human, Pair 16Maternal AgeChromosomes, Human, Pair 22CaricaChromosomes, Human, Pair 4Chromosomes, Human, Pair 10Chromosomes, Human, Pair 8Chromosomes, Human, Pair 19Sex FactorsCytogenetic AnalysisPregnancy-Associated Plasma Protein-AAbortion, SpontaneousChromosomes, Human, Pair 20Sex DifferentiationChromosomes, Human, Pair 12Chromosomes, Human, 1-3Chromosomes, Human, Pair 5Genetic MarkersChorionic Gonadotropin, beta Subunit, HumanPregnancyChromosomes, Human, 21-22 and YRecombination, GeneticChromosome InversionChromosomes, Human, Pair 14Molecular Sequence DataChromosomes, Artificial, YeastCrosses, GeneticSex Determination AnalysisFetal DiseasesCentromereChromosome BreakageTrophoblastic Tumor, Placental SiteBase Sequence