NT is also known as the thickness of the nuchal translucency, NT will not affect the baby if it is not done, but it is recommended to follow the doctor’s instructions for the test. After pregnancy, usually go to the hospital for NT examination in the time period of 11 to 13+6 weeks of pregnancy, it is to measure the thickness of fetal nuchal translucency by means of ultrasonography to determine whether the fetus has any chromosomal abnormality diseases, ultrasonography is a kind of examination using ultrasonography as a medium to probe the size and shape of human organs and internal echoes, which won’t have any effect on the development of the baby. After pregnancy, women can go to the hospital for NT examination with confidence. If the examination result is abnormal, further non-invasive DNA or amniocentesis examination can be done at the mid-pregnancy stage to determine whether the pregnancy should continue or not. After pregnancy, you should do a good job of pregnancy checkups, and seek early medical attention if you feel unwell.