RETN and polycystic ovary syndrome: Data regarding the levels of resistin and visfatin in patients with PCOS are still controversial; while some studies reported that visfatin levels is higher in women with PCOS (22-28), the other ones have not reported it (29-31), and although higher level of resistin in PCOS has been shown in one study (32), most studies reported no significant difference in resistin level between the PCOS the control groups (33-38).