Myo-Inositol (MI) is a precursors for the synthesis of phosphatidylinositol polyphosphates (PIPs). In male reproduction, it was shown that MI concentration in the seminiferous tubules is higher than in serum and it was increasing during the movement through the epididymis and the deferent duct. In the present study, the role of myo-inositol has been investigated as a possible antioxidant agent for the systemic treatment of male infertility and the improvement of the sperm's quality.