what is a normal nuchal translucency measurement at 12 weeks

According to the search results, a normal nuchal translucency measurement at 12 weeks varies slightly depending on the source, but most consider a measurement under 3.5 mm to be normal. Specifically, one source states that the normal range of nuchal translucency for 12 weeks of gestation is 1.1-3 mm, while another source provides median NT thickness values of 1.0 mm, 1.2 mm, and 1.4 mm for gestational ages of 11, 12, and 13 weeks, respectively. Another source states that in the majority of cases, a normal screening NT measurement at 12 weeks is under 3.0 mm. It is important to note that different clinics may use slightly different numbers based on their own reference ranges.