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nuchal translucency

   Also found in: Acronyms, Wikipedia 0.01 sec.
nuchal translucency
n.
A radiologic sign that appears as a translucent spot on a fetal sonogram and indicates subcutaneous fluid in the nuchal region of a fetus. It can be measured in early pregnancy to assess the risk of chromosomal abnormalities, especially Down syndrome.


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Locating each fetus and focusing in on their necks, the ultrasound assistant will take a number of pictures and take a few measurements of the fluid at the base of the necks to give to the obstetrician, who will compare the thickness of the nuchal translucency to each other as well as a "normal range" measurement.
Take for example the information leaflets about nuchal translucency scans.
Screening Tests The screening tests which are non-invasive have varying degrees of detection rates from a lowly 30% for maternal age alone to a clearly impressive 85% for a combination of maternal age, fetal nuchal translucency (scan) and maternal serum biochemistry at 11-14 weeks.
 
 
 
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