NT value of 4.3 millimeters is not normal, specific need to follow the doctor’s advice. NT examination is a detector test in early pregnancy, usually in 11~13 weeks of pregnancy plus 6 go to the hospital for examination, by doing ultrasound to measure the thickness of fetal nuchal translucency to determine whether the fetus has chromosomal abnormality. Under normal circumstances, the NT value should be under 2.5 millimeters. Now that the fetal NT value is 4.3 mm, the chances of the fetus having chromosomal abnormality are relatively high, and further examination, such as non-invasive DNA examination, amniocentesis or cord blood puncture, etc., is usually recommended to determine whether the fetus has any abnormality. In addition, if it is determined that the fetus has a chromosomal abnormality, it is usually recommended to terminate the pregnancy, subject to medical advice.