What is the NT examination during pregnancy?

NT (nuclear transparency) is a prenatal screening test to assess the risk of fetal Down syndrome. This examination is usually carried out between12 and14 weeks, and the risk of fetal chromosome abnormality is assessed by measuring the thickness of the posterior zona pellucida of the fetal neck with ultrasound. If the NT value increases, it may suggest that the fetus is at risk of chromosome abnormality.

This test is mainly non-invasive and poses no obvious risk to pregnant women and fetuses. However, it should be noted that NT examination is only a screening tool, and it cannot provide clear diagnostic information. If the NT test results are abnormal, further genetic testing, such as amniocentesis or chorionic villus biopsy, can be suggested to confirm whether there is chromosome abnormality. If you have any questions about health or medical problems during pregnancy, you'd better consult your doctor or obstetrician, who can provide you with more detailed and personalized guidance and advice.