Down’s syndrome screening is a screening test for Down’s syndrome, which is performed by measuring factors such as the maternal blood alpha-fetoprotein and combining them with the maternal age and other relevant conditions. Down’s syndrome screening is an important prenatal test to identify children with Down’s syndrome for early intervention, etc. Down’s syndrome is a chromosomal disorder that manifests itself in the form of backwardness, mental retardation and poor intelligence. Down syndrome is a chromosomal disorder, which is characterized by backwardness in intelligence, growth retardation, and special facial features such as dull expression, small eye slits and wide eye spacing. There is no effective treatment for Down’s syndrome, but screening can help prevent the birth of Down’s syndrome babies as much as possible. The main screening method is to test the pregnant woman’s blood to determine the relevant components such as alpha-fetoprotein and human chorionic gonadotropin, together with her age and weight. In some cases, imaging tests such as ultrasound, amniocentesis, and chromosome tests may also be used. Prompt medical consultation and treatment is recommended.