Feasibility of Nuchal Translucency in Triplet Pregnancies

Objective. To assess the feasibility of nuchal translucency in triplets compared with singletons. Methods. Nuchal translucency thickness as part of routine first-trimester screening in the general population was compared between 3128 singleton pregnancies and 51 triplets (153 fetuses). Crown-rump length was also noted. The 5th, 50th, and 95th percentiles were determined and compared between the 2 groups, and regression curves of nuchal translucency measurements plotted against crown-rump length were drawn. Results. The mean nuchal translucency thickness was 1.23 mm for singletons and triplets. The 5th and 95th percentiles were also the same between the 2 studied groups. The regression curves of 5th, 50th, and 95th percentiles of nuchal translucency plotted against crown-rump length of triplets and singletons overlapped. Conclusions. Nuchal translucency values and distribution are the same in triplets and singletons, validating the utility of the cutoff values.