What Is Nuchal Translucency? Results Of Ultrasound Nuchal Translucency How Much Is Normal?

Nuchal translucency ultrasound is done during the first trimester of pregnancy from 11-13 weeks or for fetal size between 45-84mm and is considered part of the screening test to help determine the pregnancy. Does the child have Down syndrome?
What is nuchal translucency?
Nuchal translucency is an ultrasound shape of a subcutaneous fluid set behind the neck of the fetus in the first trimester of pregnancy and appears as a black or translucent image on the screen. supersonic. In babies with chromosomal abnormalities, heart defects and many genetic syndromes, the nuchal translucency is higher.
Nuchal translucency measurement is usually done as part of a combined first trimester screening test, which can identify the risk of some chromosomal abnormalities, including Down syndrome

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The importance of ultrasound nuchal translucency
The nuchal translucency ultrasound is the most important test during the first trimester to help a doctor diagnose early in the pregnancy whether the baby has a malformation, namely Down syndrome or chromosomal abnormality.
If the baby is at risk of Down syndrome, pregnant women will be assigned more tests such as chorionic villus sampling, amniocentesis . .




Nuchal translucency (symbol NT) in ultrasound images
Ultrasound of nuchal translucency when?
The most accurate scan results for nuchal translucency are done from the 11th to the 13th week of pregnancy because:
The fetus before 11 weeks of age is still too small, the neck on the neck is still fuzzy, making ultrasound results inaccurate
After 13 weeks of pregnancy, the nuchal translucency has returned to normal, at this time, the ultrasound does not make sense (note that the normal nuchal translucency at the end of the 13th week is not sure if the fetus is already normal)
Ultrasound of nuchal translucency occurs like?
Ultrasound of the nuchal translucency by ultrasound of the fetus on the abdomen of the pregnant woman, in the case of a woman with a womb tilted back or overweight, the ultrasound probe will be performed to have the most accurate results.
Before the ultrasound, the doctor will apply a layer of gel to the abdomen and then use a handheld device to scan the skin of the pregnant woman. The doctor will first calculate the fetal age by measuring the length from the top of the head to the end of the spine of the fetus then measuring the nuchal translucency.
On the ultrasound screen, the white part shows the baby's skin and the black part shows the fluid accumulated behind the nape.
Ultrasound results in nuchal translucency
Normal nuchal translucency
The normal nuchal translucency is less than 3.5mm for children with the size of 45-84mm. Depending on the age of the week, there will be the following size of opaque neck:
2mm for an 11-week-old fetus
Less than 2 5mm for a 12-week-old fetus
2.



8mm for a 13-week-old fetus
Abnormal nuchal translucency
The fetus is at risk of Down syndrome if the nuchal translucency is over 3.5 mm in size, namely:
Nuchal translucency greater than 3mm, the risk of Down syndrome is high
6mm neck opacity, the risk of Down syndrome and birth defects
The opacity of the back of the neck is from 3.2-3.5mm
Note that the ultrasound scan of the back of the neck can only accurately diagnose 75% of the risk of children with Down. There is a small chance that abnormal fetal ultrasound can occur but the fetus is normal, but pregnant women should not be subjective but ignore the nuchal translucency test.
Ultrasound of nuchal translucency
Ultrasound of translucent nape of the neck where?
Obstetrics and Gynecology - Hopital General Hospital is proud of 15 years of experience in the field of obstetrics, welcoming thousands of babies, with a team of experienced doctors, modern equipment and comprehensive innovation to bring High quality service.
When registering for Maternity and Childbirth Package service at Hopital, pregnant women will enjoy the perfect and caring care during pregnancy and birth.
The Maternity Package packages at Hopital General Hospital all have regular 2D, 4D ultrasound lists and routine tests during pregnancy, including nuchal translucency ultrasound for prenatal screening, Detect abnormal fetal problems.



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