FORECASTING OF PREGNANCY OUTCOMES ACCORDING TO NUCHAL TRANSLUCENCY OF FOETUS IN THE FIRST TRIMESTER
The purpose of the study was the assessment of pregnancy outcomes according to nuchal translucency during the first trimester based on documents of urban standards of Sumgait. The unit of study was a woman with a singleton pregnancy, which was under ultrasound screening on 11-13th weeks of gestation period. The total number of women was 1050. Three observation groups were determined according to the size of nuchal translucency in the first trimester: group of women with nuchal translucency th percentile (996) on 11-13th weeks of gestation; group of women with nuchal translucency >95th (54) on 11-13th weeks of gestation; group of women with nuchal translucency >97,5 percentile (18) on 11-13th weeks of gestation. The frequency of pregnancy outcomes was assessed according to the above-noted criteria. The differences between the compared groups were estimated by the criterion х2. The ultrasound screening has showed that nuchal translucency changed within the interval of 0,72-3,89 mm, 0,77-6,45 mm and 0,99-7,89 mm correspondingly on gestation periods 11, 12 and 13 weeks. Differences in the sizes of nuchal translucency of fetuses on 11-13 weeks of gestation age was significant (5-95th percentile) and was 0,81-2,42 mm; 0,86-2,47 mm and 1,07-2,68 mm correspondingly on gestation periods 11, 12 and 13 weeks. Normal size of nuchal translucency according to ultrasound screening on 11, 12 and 13th weeks of gestation age is less than, correspondingly, 2,42; 2,47 and 2,68 mm. When the size of nuchal translucency of the foetus in the first trimester is >95th percentile, the risk of antenatal foetal death, the birth of foetuses with large anomalies, with a small and very small foetal weight increases signiicantly. The nuchal translucency in the first trimester as a marker for predicting the outcome of pregnancy is characterized by low sensitivity (95,1%) and predictive value (>95,3%).