There is no need to worry if the NT is not done. Generally, you can go to the hospital for an NT test between 11 and 14 weeks of pregnancy, and if the test is not done, you can have a repeat test again. If the test results are more than 14 weeks, the test results are relatively less accurate, so be sure to have the test during this period. If the test does not come out, you should be more active, you can walk or climb the stairs, and you can eat something, such as eating something sweet that can stimulate the fetus to be excited, so that the fetus can turn its own position, there is no other very good way to diagnose. If you really can’t find out, you can have a later screening test or 4D ultrasound, which can help determine the fetal abnormality, NT test is mainly an early screening for abnormality, and the later test is also very important.