1, the first generation of non-invasive DNA mainly detects fetal diseases on chromosome 2 1, chromosome 18 and chromosome 13, and reports these three chromosomes. For microdeletions, microreplications, some monomers and trisomies, it can't be detected.

2. The second generation of non-invasive DNA detectable 10 chromosome genetic diseases is an upgraded product based on the non-invasive DNA prenatal detection project, which increases the sequencing depth and successfully realizes the leap from chromosome aneuploidy to non-invasive chromosome microdeletion and microreplication syndrome.

The first detection may include T2 1.

, T 18, T 13 and 7 kinds of chromosome microdeletion and microdeletion syndrome, and issue effective reports.

Extended data:

Non-invasive prenatal DNA detection, using cell-free fetal DNA in pregnant women's plasma for detection. These DNAs, also known as circulating free fetal DNA, have a concentration of about 3- 13%, and are thought to mainly come from placenta, which is cleared from maternal blood within a few hours after delivery.

In 20 10, Dr. Zhou Daixing and Dr. Gao Yang took the lead in exploring the clinical application of non-invasive DNA prenatal detection for Down's syndrome, and realized the prenatal detection of Edward syndrome (T 18) and Pato syndrome (T 13) based on Down's syndrome.

Baidu Encyclopedia-Noninvasive DNA Prenatal Detection Technology