CoQ10 can improve sperm parameters and function for male factor fertility. It is an antioxidant used by mitochondria within our cells for many important processes. For sperm – CoQ10 can decrease oxidative stress caused by a buildup of free radicals within the sperm cell that interfere with many sperm functions. Studies show improved sperm function and parameters with CoQ10 supplementation in men with male factor fertility. Please see an excellent review of the literature by Salvio et al. in Anti