 Male infertility has been associated with oxidative stress. Higher levels of reactive oxygen species ROS have been found in semen from men with low sperm count and motility, and poor sperm morphology, suggesting an imbalance in the redox system and an opportunity to use oxidative stress as a biomarker for semen quality. While several methods are available for measuring oxidative stress, they are not being implemented routinely in semen analysis likely because they are arduous and typically reflect only one side of the redox balance- oxidant activity. 