A pregnant woman’s nt value of 1.9mm is within the normal range and is not on the high side. nt is an ultrasound test to check the thickness of the fetal posterior nuchal translucency. Pregnant women need to go to the hospital for nt test at 11~13 weeks+6 weeks of pregnancy to assess the risk of Down syndrome in the fetus at an early stage, and also to detect severe fetal malformations at an early stage. Under normal circumstances, the nt value should be less than 2.5mm, therefore, the test result of 1.9mm is a normal phenomenon, pregnant women do not need to worry, but if the nt value is abnormal, it is mostly related to chromosomal abnormalities of the fetus, and it is necessary to consult a doctor in time, and follow the doctor’s advice to improve further examination. Pregnant women are advised to keep a good attitude, avoid excessive worry, have a regular routine, and go to the hospital for regular checkups, and if there are any abnormalities, follow the doctor’s instructions for targeted treatment.