EGFL6 and ovarian carcinoma: Meanwhile, angiogenesis is an essential program for ovarian cancer, which is induced by numerous angiogenic factors, such as vascular endothelial growth factor A (VEGFA), fibroblast growth factor (FGF2), platelet-derived growth factor subunit A (PDGFA), EGF-like domain multiple 6 (EGFL6), and so on3–6.