Sperm DNA fragmentation was evaluated by Terminal deoxyribonucleotidyltransferase-mediated dUTP nick-end labeling assay (TUNEL) before and after treatment. No differences in basic sperm parameters were found between the Ginger treatment and the placebo group before or after treatment. However, the percentage of DNA-fragmented spermatozoa was markedly reduced (P< .005) in the Ginger treatment group after the treatment as compared with the pretreatment values). No difference in the pretreatment and post treatment incidence of sperm DNA fragmentation was observed in the placebo group. These data show that sperm DNA damage can be efficiently treated with oral Ginger extract administered during a relatively short time period.