NT scan failed 15 times

For many pregnant fathers, the NT test is still relatively unfamiliar. So, what does NT check? When should NT check be done? What are the common problems with NT check? What is the reason for 15 failed NT checks? Today, let's learn about these professional knowledge in Kepu to help you solve the "mystery" of NT check!

Why did the NT check fail 15 times?

The Nt test is an ultrasound examination of the fetal nuchal translucency performed by a woman during the second trimester of pregnancy. Accurately measuring the thickness of the fetus' neck can determine whether there is a chromosomal abnormality or heart disease. This is one of the important items in prenatal examinations.

Generally speaking, if the NT test fails several times, it may be due to the abnormal posture of the fetus. If the follow-up fails after 15 times and the test results are out of the standard range, subsequent screening for fetal abnormalities will be required, such as four-dimensional color ultrasound and DNA to further determine whether there are any abnormalities in the baby's development.

What to check

NT, or nuchal translucency, refers to the maximum thickness between the skin and subcutaneous soft tissue in the sagittal cross-section of the fetal cervical vertebrae. The NT test, also known as the nuchal translucency scanner, is a method that uses B-ultrasound to accurately measure the location of the thickest echo-free transparent layer of the subcutaneous tissue in the fetus's neck to assess whether the fetus is likely to have Down syndrome. Babies with Down syndrome will have water retention in the subcutaneous tissue, so the skin on the back of the neck will be thicker. If the NT test shows that the thickness of the fetal neck skin exceeds the standard value, it may be related to abnormalities in the fetal chromosomal karyotype and other anatomical abnormalities. The thicker the NT, the greater the chance of fetal anatomical abnormalities and chromosomal abnormalities. In addition to detecting the risk of chromosomal abnormalities, thickening of the fetal nuchal translucency is also related to congenital heart disease. If the NT test result exceeds the index range, it is recommended that the pregnant mother conduct subsequent fetal abnormality screening to further determine whether the fetus has any abnormal risk so that corresponding measures can be taken as soon as possible.

When to do NT test

Nuchal translucency scanning is usually performed between 11 and 14 weeks of pregnancy. It is technically difficult to perform NT examination before 11 weeks because the fetus is still very small. After 14 weeks, the water stored in the fetus's subcutaneous tissue may be absorbed by the developing lymphatic system, making it impossible to obtain accurate test data. Therefore, pregnant mothers need to go to the hospital for NT examination within 11-14 weeks of pregnancy.

Frequently asked questions about NT test

1. NT (nuchal translucency scanner) examination is a B-ultrasound examination item, which does not require blood tests. Eating and drinking water will not easily affect the test results, so there is no need to fast before the test.

2. Before 11 weeks of pregnancy, the fetus is too small to observe the nuchal translucency. After 14 weeks of pregnancy, the fetus gradually grows and may absorb unnecessary blood in the nuchal translucency, affecting the test results. Therefore, it is best for pregnant mothers to do NT within 11-14 weeks of pregnancy to avoid inaccurate test results.

3. It is best to make an appointment for NT in advance. Generally, you can start making an appointment with the hospital 11 weeks before pregnancy to facilitate scheduling. Do not make a reservation after 13 weeks of pregnancy to avoid long queues. Doing NT beyond the gestational age will affect the accuracy of the test results.