NT is to check the fetus or something

NT is generally used to check the thickness of the nuchal pellucid layer of the fetus. Women need to go to the obstetrics and gynecology department of the hospital for this examination from 11 to 13 weeks of pregnancy. The normal reference value should be lower than 2.5 mm. If the value is abnormal, it indicates that there is a certain probability that the fetus has chromosome abnormalities.