Fig. 2
Comparison between the cffDNA fractions from new NIPS method and the ordinary method tested on the 902 pregnancies with male fetus. a cffDNA fractions of the 902 samples using the two NIPS methods. Blue dots represented the sorted cffDNA fractions from ordinary NIPS, while red dots represent that of the corresponding samples using NIPS method with enrichment. b Boxplot for cffDNA fraction between the two NIPS methods