Expression of vascular endothelial growth factor (VEGF) and its soluble receptor-1 in endometriosis

► We evaluated expression of VEGF and its soluble receptor (sFlt-1) in endometriosis. ► VEGF and sFlt-1 levels in peritoneal fluids were increased in endometriosis. ► VEGF and sFlt-1 expressions in peritoneal tissues were increased in endometriosis. ► sFlt-1 expression in endometrium was decreased in patients with endometriosis. ► Aberrant expression of VEGF and its receptor seems to be involved in endometriosis.