What does Down screening mean?

Down screening is an important prenatal examination during pregnancy. It is necessary to go to the hospital for Down screening between 15 and 20 weeks of pregnancy. The purpose of this examination is to screen whether the fetus is healthy and whether the fetus has genetic diseases or open neural tube defects. If the test result is high risk, the possibility of fetal malformation is relatively high. In this case, amniotic fluid puncture should be performed.