Róbert Dankovčík, Peter Urdzík, Igor Lazar, Alexander Ostró, Radomír Hredzák
Nuchal translucence is the sign observed by sonography between 10ts - 14th week of pregnancy. Thickness of nuchal translucence over 95 % of percentil is found in more than 70 % of foetuses with trisonomy 21. In the study 494 pregnant women were examined. Sonographic measuring of nuchal translucence (NT) was performed between 11+3 - 13+6 weeks of gravidity. Minimum length of the embryo was 83 mm. After computer elaborating of data the value of median (MoM) according to crown-rump length (CRL) was added to each NT value in mm. Value two-fold higher than MoM was measured 6 times (1,21 %). In two cases a false positive finding was measured. In 4 cases a pathological finding was recorded (1 suspected Smith-Lemli-Opitz syndrome, 1 Turner syndrome, 1 hydrocephalus and 1 defect of ventricular septum). Our study has been the first study in Slovakia that determined median NT on the representative group of women for non-selected Slovak population.