"Nuchal fold thickness is measured on an axial section through the head at the level of the thalami, cavum septi pellucidi, and cerebellar hemispheres (i.e. in the same plane that is used to assess the posterior fossa structures). One calliper should be placed on the outer edge of the skin, and the other against the outer edge of the occipital bone. The ideal angle of insonation is approximately 30o to the horizontal. This plane is less likely to produce a false positive thickened nuchal fold."
"Noonan's syndrome"
Expected headings
"Associations"
"Technical considerations"
"The nuchal fold is known to increase throughout the second trimester in a normal pregnancy, and may be measured during a broader window of 14 and 24 weeks when required. There is some controversy regarding the normative thresholds at the earlier and later gestations; some authors advocate the use of a nomogram 10, while others suggest that the 6 mm upper limit may be appropriate up to 24 weeks 11."
"The nuchal fold is known to increase throughout the second trimester in a normal pregnancy, and may be measured during a broader window of 14 and 24 weeks when required. There is some controversy regarding the normative thresholds at the earlier and later gestations; some authors advocate the use of a nomogram 10, while others suggest that the 6 mm upper limit may be appropriate up to 24 weeks 11."
"An abnormally thickened nuchal fold or even a cystic hygroma may resolve, especially toward the third trimester; however, the risk of karyotypic abnormalities is not reduced."