Humans human 6 Male 5 male 5 metabolism 5 reactive oxygen metabolite 5 Antioxidants 4 Oxidative Stress 4 Reactive Oxygen Species 4 antioxidant 4 oxidative stress 4 Female 3 Infertility, Male 3 Reactive oxygen species 3 Review 3 adult 3 female 3 male infertility 3 Adult 2 Article 2 Assisted reproductive technology 2 DNA damage 2 In vitro fertilization 2 Infertility 2 Male infertility 2 Oxidative stress 2 Semen Analysis 2 alpha tocopherol 2 ascorbic acid 2 controlled study 2