Before revision: Since 2014, noninvasive testing has identified aneuploidies in chromosomes 13, 16, 18, 21, 22, X and Y, including Down syndrome (caused by trisomy 21), Edwards syndrome (caused by trisomy 18), Patau syndrome (caused by trisomy 13), as well as sex chromosomes aneuploidies, such as Turner syndrome (45, X) and Klinefelter syndrome (47, XXY).
After revision: Since 2014, noninvasive testing has identified aneuploidies in chromosome 13, 16, 18, 21, 22, X and Y, including Down syndrome (caused by trisomy 21), Edwards syndrome (caused by trisomy 18), Patau syndrome (caused by trisomy 13), as well as sex chromosomes aneuploidies, such as Turner syndrome (45, X) and Klinefelter syndrome (47, XXY).