The damage caused by free radicals to sperm DNA is tremendous as DNA strands are especially susceptible to the process of oxidation. Sperm DNA may split or partially oxidize when affected by free radicals. Due to the detrimental effects of the free radicals, the DNA strand may lose its main function of carrying coded genetic information required for the replication of cells. Research shows that the DNA in approximately half of infertile men has been damaged.
A large scale scientific research analysis carried out in 2008 is the best clinical proof of the sperm DNA quality. It revealed a direct connection between sperm DNA damage and miscarriages. The more fragmented the sperm DNA strands, the more frequent the miscarriages.