What is Down syndrome screening?

Generally, Down syndrome screening is a test that assesses the risk of a fetus having Down syndrome by measuring maternal serum markers combined with gestational age and other factors. Detailed analysis is as follows:

This screening requires drawing blood from the pregnant woman to measure markers such as alpha-fetoprotein and human chorionic gonadotropin, which, together with the mother's age and gestational age, are used to calculate the risk value. It is simple, minimally invasive, and can preliminarily identify risks of fetal chromosomal abnormalities, providing a reference for further intervention.

Down syndrome screening has certain limitations, as results only indicate risk levels rather than providing a definitive diagnosis. A low-risk result does not completely rule out the possibility of the condition, and a high-risk result does not necessarily mean the fetus is affected. Further testing is required for a confirmed diagnosis, and decisions should not be based solely on this screening result.

Down syndrome screening must be completed within the recommended gestational age window. After receiving the results, it is important to consult with a doctor promptly and, if necessary, undergo additional tests to ensure an accurate assessment of fetal health.