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P65Feasibility and accuracy of NT measurement in twin pregnancies
Author(s) -
Dreazen E.,
Maymon R.,
Weinraub Z.,
Herman A.
Publication year - 2000
Publication title -
ultrasound in obstetrics and gynecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.202
H-Index - 141
eISSN - 1469-0705
pISSN - 0960-7692
DOI - 10.1046/j.1469-0705.2000.00004-1-65.x
Subject(s) - medicine , singleton , obstetrics , gestation , gestational age , nuchal translucency , twin pregnancy , fetus , gynecology , ultrasound , pregnancy , first trimester , radiology , genetics , biology
Background The aim of our study was to evaluate the feasibility and accuracy of nuchal translucency measurement (NT) in twin pregnancies. Method We reviewed nt images of 66 pairs of twins (10.3–14 weeks gestation), matched with nt images of 66 pairs of consequent singleton pregnancies with similar gestational ages. Each of the inspected images was assigned a score, which classified it into one of four quality zones. Results In the twins, as well as in the singleton control group, the vast majority of the nt images were in the excellent‐reasonable zones (−88%), and 10% in each of the groups had their nt images in the intermediate zone (11% vs. 12%). Less than 1.5% of the images were of unsatisfactory quality (1.5% vs. 0.8%), according to the strict criteria, required for reliable, comparable and reproducible results. (Hennan et al . Ultrasound Obstet Gynecol 1998; 12: 398–403). Conclusion NT measurement in twin pregnancies is as feasible, accurate and reproducible as in singleton pregnancies. However, it provides a better DS risk assessment when compared with the second trimester triple test in twin pregnancies, as it evaluates DS risk individually for each of the fetuses.