NT2.8 means NT2.8mm. Whether NT2.8mm is serious or not needs to be decided based on a combination of the upper NT reference limit value and relevant follow-up tests. NT value refers to the thickness of the fetal posterior nuchal translucency layer, which is an indicator of fetal chromosome aneuploidy screening. When chromosomal abnormalities, cardiac disease, or impaired lymphatic reflux are present in the fetus, this can lead to fluid deposition in the posterior nuchal region, resulting in an increase in the thickness of the translucent layer. Usually the best time for an NT test, is between 11 and 13+6 weeks of pregnancy. normal values for NT results vary from hospital to hospital. It is generally considered normal to have an NT value ≤ 2.5mm or an NT value ≤ 3.0mm. If the examination finds that the NT value is 2.8, it is recommended to consult a doctor in time, and under the doctor’s guidance, improve the relevant examinations to clarify the cause of the disease and treat the symptoms.