Fasting is not required for the NT test, which is an ultrasound test that measures the thickness of the fetal nuchal translucent layer, and dietary factors will not affect the accuracy of the NT test results, so there is no need to fast prior to the NT test.The NT test is performed between the 11th and 13th week of pregnancy plus 6 days, and there is no need to hold your urine during the ultrasound test at this time. If the pregnant woman has not had systematic checkups during pregnancy, including liver and kidney function tests, blood glucose, blood lipids, and routine blood tests. These tests may need to be done at the same time when the NT test is done, and the patient should be seen in a fasting state.The result of the NT test can indicate the risk of the fetus having Down syndrome and congenital heart disease.