The pregnancy test of NT belongs to the category of non-invasive prenatal screening, which is usually carried out at 1 1~ 13 weeks of pregnancy. The thickness of the transparent layer of the fetal neck is more than 5mm, suggesting that there may be fetal chromosome abnormalities or other developmental defects, which need further examination. However, it should be noted that NT examination can not diagnose chromosomal abnormalities or other diseases. It is only a preliminary screening of the fetus, and the specific diagnosis needs further examination.
Generally speaking, NT examination during pregnancy can help pregnant women understand the fetal health and take timely measures to protect the fetal health. Prenatal screening during pregnancy is not very reliable, but after this test, if the fetus is found to have chromosomal abnormalities or other developmental abnormalities, parents can receive psychological counseling and medical intervention in time, and lay a more solid foundation for the healthy growth of their children through a series of treatment and conditioning measures.