Down screening is one of the important maternity tests during pregnancy that can help assess whether the fetus is at risk for Down syndrome. The results of Down’s syndrome screening for pregnant women are usually available in about a week, depending on the local hospital. The screening test is performed by taking the serum of a pregnant woman and measuring the concentration of alpha-fetoprotein, chorionic gonadotropin and free estriol in the mother’s serum, and calculating the risk of having a fetus with congenital defects by taking into account the pregnant woman’s due date, age, weight and the week of pregnancy when the blood is taken. There are two types of screening tests: early screening is usually performed at 11-13 weeks and midterm screening is usually performed at 15-20 weeks. If the results of the screening test show that the fetus is at high risk of Down syndrome, further chorionic villus sampling or amniocentesis should be performed to confirm the diagnosis. While waiting for the results of the Down’s syndrome test, you should relax and avoid excessive anxiety and tension, eat regularly and rest, pay attention to strengthening your nutrition, eat more meat, eggs, milk and other protein-containing foods, and pay attention to timely supplementation of folic acid, calcium, etc.