[Evaluation of a programme for the prenatal screening for Down's syndrome by ultrasonographic nuchal translucency measurement and serum determinations in the first trimester of pregnancy].

Abstract

The diagnostic value of the first-trimester combination test was greater than that of only nuchal translucency measurement. Moreover, the diagnostic value was greater if the chances were calculated on the basis of the median values of the VU Medial Centre population than when other median values were used.