The Down screening critical risk value requires further prenatal diagnosis and does not matter if there are no abnormalities. Down screening critical risk is defined as between high risk and low risk, which represents the possibility of a fetus having Down’s syndrome. Down’s screening is a test for fetal trisomy 18-trimester, trisomy 21, and open neural tube defects. It is only a preliminary check for chromosomal abnormalities or open neural tube defects in the fetus, not a definitive diagnosis. Checking for critical risk requires further non-invasive DNA or amniocentesis to confirm the diagnosis. If the fetus is at low risk on further examination, the pregnancy can continue without serious problems. However, if the amniocentesis is abnormal, the pregnancy needs to be terminated if necessary. If there is any discomfort, go to the obstetrics and gynecology department of the hospital.