Vitamin E supplementation in semen-freezing medium improves the motility and protects sperm from freeze-thaw-induced DNA damage

This study evaluated the effect of vitamin E supplementation to cryoprotective media on post-thaw motility and DNA integrity of normozoospermic and asthenozoospermic semen samples. The results of this study indicate that supplementation of vitamin E (5 mM) significantly improves the post-thaw motility and DNA integrity in normozoospermic and asthenozoospermic semen samples. (Fertil Steril (R) 2011;95:1149-51. (c) 2011 by American Society for Reproductive Medicine.)