Proteins that decreased with COVID-19 in pregnancy but were increased in non-pregnant cases included vascular endothelial growth factor receptor 1 (VEGF-sR1 or sFLT-1) and angiotensinogen (AGT); yet, this could potentially be explained by their already elevated baseline among pregnant patients (Fig. 6b, c and Supplementary Data 10). This evidence concerns the gene FLT1 and COVID-19.