Female friends often need to go to the hospital for prenatal check ups during pregnancy. Pregnant women should pay attention to prenatal check ups, especially B-ultrasound, Down syndrome screening, and NT examination, which are all very important examination items. Pregnant women must undergo the examination at the designated time. So, what does' nt 'mean for pregnant women's check ups?
Pregnancy NT examination is a method of measuring the thickness of the nuchal translucency of the fetus through ultrasound. The nuchal translucency is the subcutaneous gap behind the fetal neck. Doctors measure the gap between the skin and soft tissues and take the maximum value. By this value, it can be inferred whether the fetus has chromosomal abnormalities.
Fetuses with chromosomal abnormalities may have significant thickening of the nuchal translucency, especially in children with Down syndrome. If the thickness of the nuchal translucency of the fetus exceeds 2.5mm or even reaches 3mm after undergoing NT examination, it is necessary to be vigilant as the fetus may have chromosomal abnormalities. Moreover, the higher the thickness value, the greater the probability of chromosomal abnormalities. At this point, a DNA test or amniocentesis should be performed to confirm the specific condition of the fetus.
The best time for pregnant women to undergo NT examination is between 11-13 weeks of pregnancy, so pregnant women should arrange the examination time in advance to avoid missing the examination. If the examination is not conducted until 14 weeks of pregnancy, accurate results will not be obtained.
