Non-invasive DNA testing can be performed from 12 weeks to 24 weeks of pregnancy. Non-invasive DNA only requires 5ml of venous blood from the pregnant woman. Using the new generation DNA sequencing technology, free DNA fragments in the maternal peripheral plasma are sequenced and the sequencing results are analyzed for bioinformatics to obtain fetal genetic information to detect whether the fetus has the three major chromosomal disorders of Down’s syndrome, Edward’s syndrome and Patau syndrome. The maturity of DNA sequencing technology ensures the accuracy of the technology, which can reach over 99%. The test can be performed on pregnant women at 12 weeks or more, and the test report can be issued in 10 working days.