We observed a positive relationship between serum ferritin concentration and plasma TG concentration (r = 0.25, p = 0.04), FAI (r = 0.45, p = 0.0001), serum insulin concentration at baseline (r = 0.25, p = 0.04), and 120 min of OGTT (r = 0.31, p = 0.01), as well as with HOMA-IR (r = 0.30, p = 0.01), only in the PCOS group. This evidence concerns the gene INS and polycystic ovary syndrome.