NT refers to the thickness of fetal nuchal translucency measured by ultrasound, and NT1.4mm means that the thickness of fetal nuchal translucency measured by ultrasound is 1.4mm, which is a normal value, and it is less likely that the fetus will have Down’s syndrome and other chromosomal abnormalities. The ultrasound measurement of fetal nuchal translucency needs to be performed at a specific time, and the best time to perform the test is between 11 weeks and 13 weeks plus 6 days of gestation. If the test is performed before 11 weeks of gestation, the fetus is too small to be measured, and if the test is performed after 14 weeks of gestation, the decrease in amniotic fluid is not favorable for measurement. The normal reference value for the thickness of the nuchal translucency is less than 3.0 mm, and if the value is greater than 3.0 mm, chromosomal karyotyping, amniocentesis, and non-invasive DNA testing are needed. The thickness of fetal nuchal translucency is 1.4 mm, which is within the normal range and does not require further examination.