Fig. 3From: Positive predictive value of non-invasive prenatal screening for fetal chromosome disorders using cell-free DNA in maternal serum: independent clinical experience of a tertiary referral centerNIPS results for this cohort. aSex chromosome aneuploidies were included in only 520 patients. bTwo patients had abnormal results for two different chromosomes. Abbreviations: NIPS, non-invasive prenatal screeningBack to article page