NT test refers to the fetal nuchal translucency thickness test. A high NT value at the beginning of the pregnancy test may be normal, but it does not exclude pathological conditions such as trisomy 21, which may lead to cranial widening in late pregnancy. NT test is a non-invasive imaging method for early detection of the presence of fetal abnormalities, and is able to detect chromosomal abnormalities such as Down’s syndrome. However, a high NT does not necessarily mean that there is something wrong with the fetus, but only suggests that there is an increased risk of adverse conditions such as Down syndrome, and that it is still possible to deliver a normal fetus. If it is clear that the fetus has malformations through tests such as amniocentesis or cordocentesis, it may lead to cranial widening of the fetus in late pregnancy. If the NT value is high at the beginning of pregnancy test, it is recommended to consult a doctor in time, and under the doctor’s guidance, improve the relevant examination, clarify the cause of the disease, and treat the symptoms. During pregnancy, pay attention to rest more, at the same time should relax, avoid tension, anxiety, any discomfort should be timely to the hospital, the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.