Non-invasive DNA prenatal detection technology adopts second-generation sequencing technology, which belongs to DNA molecular level detection. The detection accuracy of this technique for three major chromosomal diseases, 2 1 trisomy (Down syndrome),1trisomy and1trisomy, is over 99%, and verbal prompts will be given if other chromosomes are abnormal.
Another advantage of non-invasive DNA prenatal testing is safety and non-invasive. Compared with amniocentesis, it belongs to non-invasive prenatal examination, and there is no risk of abortion infection.
At present, the cost of testing about 3,000 yuan is slightly more expensive than that of ordinary families, but with the reduction of the cost of second-generation sequencing technology, the cost of non-invasive DNA prenatal testing will also be reduced to a generally acceptable level in the near future.