At present, Beijing 30 1 Hospital, Guangzhou Southern Hospital, Shenzhen Second People's Hospital, Shenzhen Maternal and Child Health Hospital, Wuhan Maternal and Child Health Hospital, Nanjing Maternal and Child Health Hospital, Chongqing Southwest Hospital and other hospitals can all do it.

1, non-invasive prenatal DNA detection is also called non-invasive prenatal DNA detection, non-invasive fetal chromosome aneuploidy detection, etc. According to the Committee of American College of Obstetrics and Gynecology, an international authoritative academic organization, non-invasive prenatal DNA testing is the most widely used technical name. ?

2. Non-invasive DNA prenatal detection technology only needs to extract pregnant women's venous blood, and use the new generation of DNA sequencing technology to sequence the free DNA fragments (including fetal free DNA) in pregnant women's peripheral plasma. The biological information analysis of the sequencing results can get the genetic information of the fetus, so as to detect whether the fetus has three chromosomal diseases.

3. Maternal plasma contains fetal free DNA, which provides a realistic basis for this project. Fetal chromosome abnormality will bring slight changes in maternal DNA content, which can be detected by deep sequencing and biological information analysis, providing theoretical basis for the project.