Abnormalities in the number of chromosomes 13, 18, 21, X and Y accounted for 95% of the chromosomal abnormalities in newborns, namely trisomy 13 (1/10,000), trisomy 18 (1/6,000), trisomy 21 (Down syndrome) (1/660), Klinefelter syndrome (47,XXY), triple-X syndrome (47,XXX), Turner syndrome (45,X) and (47,XYY).

For prenatal diagnosis, amniotic fluid or chorionic villus cells can be used for the test, with a high success rate, eliminating the need for cell culture and karyotyping, eliminating the problem of low success rate of karyotyping, with high sensitivity and high specificity;

Short testing time, same day results, which can relieve pregnant women's anxiety and buy time for the choice of treatment options.