A century after Down syndrome was first described, scientists discovered that the root cause of this disorder is a condition called trisomy 21 ... usually chromosome 14 or 15.

Recognition of the clinical features of Trisomy 13 syndrome, a common autosomal trisomy, provides the basis for diagnostic testing and counseling of families. This article provides a systematic ...

Although the median survival time for Trisomy 13 is between 2.5 and 8.5 days, [36,37] recent population-based studies have reported long-term survival rates of approximately 10% of infants with ...

There is also an apparent "bump" in trisomy among teenage girls. This slight increase has also been observed in several studies of Down syndrome, and might reflect a tendency to non-disjoin in the ...