VEGFR-1 measurements were not significantly different between women with preeclampsia as compared to controls for GW1 or GW2; however, VEGFR-1, sFlt1-1 and sFlt1-14 concentrations were significantly different between women with preeclampsia (n = 10) compared to control women (n = 121) for GW3. This evidence concerns the gene FLT1 and preeclampsia.