Nuchal fold thickness at 14-16 weeks' gestation as measured by transvaginal sonography.
OBJECTIVE
To establish normal values of fetal nuchal fold thick-ness at 14-16 weeks of gestation by transvaginal sonography.


METHODS
Transvaginal sonography was used to measure nuchal fold thickness in 182 normal pregnancies at 14-16 weeks of gestation. Nuchal fold thickness was measured as the distance from the outer skull bone to the outer skin surface in the transverse axial image in the suboccipital-bregmatic plane of the head.


RESULTS
There was no significant association between nuchal fold thickness and gestational age (r = 0.084; P = 0.258). The mean (standard deviation) was 2.2 (0.5) mm and the 95th centile was 3.0 mm.


CONCLUSIONS
The 95th centile of nuchal fold thickness measured by transvaginal sonography at 14-16 weeks is 3.0 mm.
Ben-Ami
M
M
Department of Obstetrics and Gynecology, Poriya Hospital, Tiberias, Israel. benamimo@netvision.net.il
Perlitz
Y
Y
Mukary
M
M
Peleg
D
D
D000328:Adult; D025063:Chromosome Disorders / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D009333:Neck / Q000000981:diagnostic imaging* / Q000196:embryology*; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D012016:Reference Values; D016216:Ultrasonography, Prenatal