Will the NT value decrease if it is too high

In some cases, a high NT value may naturally decrease with increasing gestational age, but it needs to be combined with ultrasound re examination and further prenatal evaluation. NT thickening may be associated with fetal chromosomal abnormalities, structural abnormalities, or temporary delayed development of the lymphatic system. If the NT value measured at 11-14 weeks of pregnancy is slightly higher, there may be a physiological decline. The fetal lymphatic system gradually matures in mid pregnancy, and some NT thickening caused by poor lymphatic fluid reflux may alleviate on its own. When the re examination ultrasound shows a decrease in NT value and no other abnormalities, it usually indicates a low risk. But chromosome problems need to be ruled out through non-invasive DNA or amniocentesis, and structural development needs to be confirmed in combination with large exclusion ultrasound. When the NT value significantly exceeds the normal range or remains unchanged, it often indicates pathological factors. Chromosomal abnormalities such as trisomy 21 syndrome and trisomy 18 syndrome are often accompanied by continuous thickening of NT, and congenital heart malformations or skeletal developmental abnormalities may also cause NT values to be unable to fall back. This type of situation requires fetal echocardiography, detailed structural screening, and genetic diagnosis to determine the cause.

It is recommended that pregnant women follow medical advice to complete subsequent prenatal diagnosis and avoid excessive anxiety. Balanced supplementation of folic acid and high-quality protein, control blood sugar and blood pressure within normal range, reduce prolonged standing or vigorous exercise. Regularly monitor fetal growth and development indicators, and if necessary, refer to a prenatal diagnosis center for multidisciplinary evaluation.