Infertility is the inability of a sexually active, non-contracepting couple to achieve pregnancy in one year. The causes of male infertility include, the testicular primary failure, deficient gonadotropin secretion, hyperprolactinemia or idiopathic male infertility. The present study was conducted to verify the relationship of male sex hormones changes with serum lipid profile and oxidative stress. To achieve this aim 75 infertile men with ages of 20-40 years and 35 fertile men with ages of 20-40 years were enrolled. Sex hormones were estimated by an enzyme immunoassay method with final...