The mean age of the pregnancies was 32.6 ± 6.3 years old, mean gestational age was 12.6 ± 1.8 weeks, and the mean nuchal translucency was 4.1 ± 1.7 mm.
Tuổi mẹ trung bình 32,6 ± 6,3 tuổi, tuổi thai trung bình 12,6 ± 1,8 tuần, và độ mờ da gáy trung bình 4,1 ± 1,7 mm.