SOD1 and Infertility: Tween-one reports were included in the meta-analysis of SOD activity in seminal plasma with 1808 infertile patients and 760 fertile controls [6, 8, 26, 38, 39, 47, 48, 52, 53, 56–58, 60, 63, 67, 76, 79, 80, 82, 84, 85, 87].