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Aneuploidy is a genetic condition where a cell has an abnormal number of chromosomes, meaning it doesn't have the typical pairs. This deviation from the normal chromosome number, which is usually a multiple of the haploid number, often results from errors during cell division that lead to an unequal distribution of chromosomes.123

A common type of aneuploidy is trisomy, where there are three copies of a particular chromosome instead of the usual two. This results in a total of 47 chromosomes in the cell, rather than the standard 46. Aneuploidy can affect various cells and is often linked to congenital disorders. While many conceptions with aneuploidy result in miscarriage, it can also be present at birth and detected through genetic testing.43

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