Blood collection tube study qPCR results comparing TruTip (left) and Qiagen (right) extraction methods with Tukey-Kramer statistical analysis (shown to the right as circles) for A) total DNA, B) cffDNA and C) % fetal DNA.

<p>Confidence intervals of 95% are represented by the diamond; middle bar equals the mean values with standard deviations above and below.</p>