KDR and polycystic ovary syndrome: The results demonstrated that acupuncture dramatically enhanced the expression of VEGF, VEGFR2, P-PI3K, AKT, P-Akt protein and VEGF, VEGFR, PI3K, and AKT mRNA in the endometrium of PCOS rats, along with the rising of vascular permeability factors eNOS and NO.