What does fetal nt test mean?

From diagnosis of pregnancy to delivery, pregnant women need to undergo many prenatal tests. When the pregnancy is 12 weeks, female friends need to go to the hospital to establish a perinatal health guide. The first pregnancy check-up includes basic blood tests. In addition to the gynecological examination, another examination that needs to be done is the abdominal color Doppler ultrasound examination. During the abdominal ultrasound in the early stages of pregnancy, on the one hand, it is necessary to rule out ectopic pregnancy, and on the other hand, it is necessary to check the fetal nt value. So what does pregnancy test mean?

NT refers to the examination of the fetal nuchal translucency, which mainly examines the thickness of the fluid accumulation in the subcutaneous tissue behind the fetal neck. It is very important to understand the NT status of the fetus, especially through ultrasound examination, and to understand the thickness of the fetus's nuchal translucency. Once the fetus's nuchal translucency thickens, it also means that the possibility of detecting abnormalities in the fetus is also increasing.

During the growth and development of the fetus, a transparent fluid appears in the neck, which will gradually disappear as the baby grows. In terms of time, it usually appears at 11 weeks of pregnancy and disappears immediately at 14 weeks of pregnancy. According to the time when NT appears, the best time for the fetus to do NT is between 10 and 14 weeks of pregnancy. NT can detect whether the fetus has heart development abnormalities or Down syndrome.

Generally speaking, the value of NT is proportional to the number of weeks of pregnancy. In other words, the greater the number of weeks of pregnancy, the greater the NT of the fetus will be. Once the NT thickness exceeds the normal range, that is, exceeds 3mm, we need to consider that the fetus has certain abnormal symptoms and needs to be followed up.

Based on the above introduction, we know what pregnancy test nt means. The full name of the nt value is the thickness of the fetal nuchal translucency, which is used to screen for fetal chromosomal abnormalities. There is a certain time limit for natural NT, and the best time is between 11 weeks and 10 weeks of pregnancy. Although NT can identify the baby's facial features, the baby is not fully developed at this time and it is generally not easy for us to distinguish them.