Prenatal genetic diagnosis is suitable for the following populations:

1. Pregnant women with abnormal fetal ultrasound examination, family history of congenital abnormalities, or children with congenital abnormalities.
2. Senior pregnant women over 35 years old
3. Tang Si high-risk pregnant women
4, B-mode abnormalities: stunting, NT abnormalities, etc.
5. Pregnant women with unexplained miscarriages, stillbirths, teratopsies or a history of neonatal death
6. Carriers of balanced translocation, carriers of genetic diseases, bad family genetic history
7. This pregnancy has pregnant women with too much amniotic fluid, too little amniotic fluid, and developmental constraints.
8. History of adverse contact in early pregnanc