FLT1 and hypertensive disorder: Similar to a model in nonhuman primates, baboons, when performing uterine artery ligation, we observed findings similar to preeclampsia, such as hypertension, proteinuria, increased circulating concentrations of soluble vascular endothelial growth factor receptor 1 (sVEGFR-1; also known as soluble fms-like tyrosine kinase-1 [sFlt-1]) and endoglin.