Patient's question:
NoDoctor's answer:
The Down syndrome screening is a non-invasive test method for fetuses, which is cost-effective, simple, and safe, conducted between the 14th and 18th weeks of pregnancy. Only 2 milliliters of the pregnant woman's venous blood is required, and the results can be obtained 2 to 3 weeks after the blood draw. If the serum screening is positive, further amniocentesis is needed to confirm the diagnosis and determine the appropriate treatment. Down syndrome screening can also detect high-risk pregnant women for neural tube defects, 18 trisomy syndrome, and 13 trisomy syndrome.