Pregnancy check ups are a very important thing, and for pregnant women who have the conditions, it is necessary to have regular pregnancy check ups, which play a very important role in observing the health and growth and development of the child. However, the pregnancy test also requires a suitable time, and the best testing time cannot be missed. Below, the editor will take you to pay attention to a question: when is the best time to do fetal NT examination?
When is the best time to do NT examination
1. Due to the small size of the fetus before 11 weeks of pregnancy, it is difficult to observe the nuchal translucency. However, after 14 weeks of pregnancy, as the fetus gradually develops, excess body fluids may be absorbed from the nuchal translucency, affecting the test results. Therefore, it is best for pregnant women to undergo NT testing between 11-14 weeks of pregnancy to avoid inaccurate test results.
2. Cervical posterior transparent band scan is usually performed between 11-14 weeks of pregnancy, and it is technically difficult to perform NT examination before 11 weeks because the fetus is still too small at this time. After 14 weeks, the subcutaneous fluid in the fetus may be absorbed by the developing lymphatic system, making it impossible to obtain accurate detection data. Therefore, pregnant women need to go to the hospital for NT examination within 11-14 weeks of pregnancy. Generally, cervical posterior transparent band scanning can be performed in tertiary hospitals or large specialized obstetrics and gynecology hospitals.
The necessity of NT inspection
1. In China, doctors generally recommend that high-risk groups for Down syndrome undergo cervical posterior transparent band scanning, such as pregnant women over 35 years old, those who have previously given birth to Down syndrome infants, or those with a family history of giving birth to Down syndrome infants. Although posterior cervical transparent band scanning cannot accurately determine whether the fetus is infected, it can help pregnant women decide whether further diagnostic testing is needed.
2. Cervical posterior translucency scan is a method of evaluating whether a fetus may have Down syndrome and is a screening tool. NT examination is different from diagnostic tests such as chorionic villi biopsy or amniocentesis, as they can provide a definitive diagnostic result, but NT examination can only indicate risk.
3. The accuracy of the posterior cervical transparent band examination is determined by many factors, including the level of the B-ultrasound physician and the precision of the scanner used, so the examination results cannot guarantee 100% accuracy.
4. NT examination can only provide reference for whether further prenatal diagnosis is needed, and cannot be used to determine whether the fetus is abnormal based on the ultrasound screening results. To determine whether the fetus has chromosomal abnormalities, further chromosome analysis still relies on chorionic villus sampling or amniocentesis.
The above is the information compiled by the editor on when is the best time to perform fetal NT examination. Nt examination is a necessary item for prenatal check ups and plays a significant role in the process. For pregnancy tests, mothers must pay enough attention and not just deal with them. They need to rely on cloud based pregnancy tests to discover their own problems and reduce the confusion of pregnancy.
