Non-invasive DNA prenatal diagnosis is to use the new molecular biology sequencing technology to extract 6-8 ml venous blood from pregnant women to diagnose whether there is chromosomal abnormality in the fetus.

Applicable people

( 1)

Older pregnant women (over 35 years old) who are unwilling to choose invasive prenatal diagnosis (villus sampling, amniocentesis and umbilical cord blood puncture);

(2)

Tang screening results are high-risk or single index values change, and pregnant women who are unwilling to choose invasive prenatal diagnosis;

(3) During pregnancy, B-ultrasound examination showed that the fetal NT value increased or other anatomical abnormalities,

Unwilling to choose pregnant women with invasive prenatal diagnosis;

(4) Pregnant women who are not suitable for invasive prenatal diagnosis, such as virus carriers, placenta previa, low placenta, oligohydramnios, RH blood group negative, abortion history, threatened abortion or baby;

(5)

Pregnant women who have not received amniocentesis cell culture and are unwilling or unable to undergo invasive prenatal diagnosis again;

(6) We hope to exclude fetal 2 1 trisomy, 18 trisomy and1trisomy syndrome, and voluntarily choose pregnant women for non-invasive prenatal testing;

(7) Pregnant women with positive serum screening and pregnant women with psychological disorders in prenatal diagnosis.

Non-invasive DNA can be obtained from 0/5 week to 0/8 week of pregnancy, and the cost is about 2500 yuan.