Increased nuchal translucency, with measurements more than 3 mm Increased nuchal translucency, with measurements more than 3 mm. Calipers (+) measure the fluid under the skin in the back of the fetal neck. The nuchal translucency is more than 3 mm, which is always abnormal. Calipers are recommended to get accurate measurements. Source: Introduction to Women's Imaging, Introduction to Diagnostic Radiology Citation: Elsayes KM, Oldham SA. Introduction to Diagnostic Radiology; 2015 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/1562/elsayes_ch10_fig-c7-01.png&sec=95880682&BookID=1562&ChapterSecID=95880501&imagename= Accessed: November 03, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved