nuchal translucency test

nuchal translucency test

A method of ultrasound detection of fetuses with a chromosomal abnormality, especially Down's syndrome. The examination consists of the assessment of small collections of fluid at the back of the neck and spine of the fetus that increase translucency. About three-quarters of cases of Down's syndrome can be detected in this way.
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The nuchal translucency test, which measures levels of fluid in a small area in the back of the fetal neck, has been available in the United States for approximately 15 years.