VEGFA and ovarian hyperstimulation syndrome: This signals a diagnosis of OHSS, which is characterized by the excessive accumulation of vasoactive and angiogenic substances activating the vascular epithelial growth factor (VEGF) and interleukin (IL) 6 signaling, leading to a systemic inflammatory response, and variable clinical manifestations of cardiovascular collapse, septic shock, and thromboembolism in the most severe cases [48,49,50,51,52,53].