Down's screening can be done a few months pregnant

Down's screening is an extremely important test after pregnancy. Down's screening is to take maternal blood to check whether there are chromosomal abnormalities in the fetus. Down's screening is divided into first trimester Down's screening, which is carried out at about the 10th-14th week of pregnancy. Down's screening can be carried out at the 16th-21st week of pregnancy. Two indicators need to be checked in the first trimester and three indicators need to be checked in the second trimester. Down's screening only determines whether there is a low or high risk. It is only a risk test and does not determine that the fetus is normal. If the screening results indicate that there may be problems with the fetus, further amniotic fluid puncture examination may be needed to provide more accurate information on the condition of the fetus.