Table 1. Size distribution of fetal and total DNA in maternal plasma and fetal DNA percentages in different size fractions.
SampleKaryotypeMedian length, bpFetal DNA estimated from chrX, %Fetal DNA estimated from trisomic chr, %
Non-chrYaChrYAll reads0–150 bp150–170 bp170–600 bpAll reads0–150 bp150–170 bp170–600 bp
P4846XY1641636.645.724.008.28
P5247XY+2116115321.0630.3013.3215.0421.4632.0814.5815.16
P5947XY+1816516242.2046.9036.8838.3442.3452.4841.5434.72
P6447XY+131641556.7813.082.682.7612.7222.889.225.12
P7346XY15914824.7237.4614.3812.20
P7447XY+2116415916.4416.5211.4814.3216.8222.1816.2010.16
P7546XY16415215.1625.326.926.44
  • a chrY, chromosome Y.