Figure 4From: Disease specific characteristics of fetal epigenetic markers for non-invasive prenatal testing of trisomy 21 Methylation ratio of each CpG site in EP6 and EP7 by bisulfite direct sequencing. Data are presented as mean ± standard deviation. Red bars, Trisomy 21 placenta samples (n = 5); orange bars, normal placenta samples (n = 6); yellowish bars, pregnant normal whole blood (n = 8); green bars, non-pregnant normal whole blood (n = 4). *** P <0.001.Back to article page