“…Oxidative stress, observed in 30%–80% of infertile men (Agarwal, Prabakaran, & Allamaneni, ; Aitken & Fisher, ; Bisht, Faiq, Tolahunase, & Dada, ), is defined as an imbalance between reactive oxygen species (ROS) levels and total antioxidant capacity (Gulum et al, ), in favour of the oxidative molecules (Sikka, ; Sikka, Rajasekaran, & Hellstrom, ). As it relates to male infertility, oxidative stress has been observed during spermatogenesis, after spermatogenesis, during epididymal maturation (Ogórek, Gąsior, Pierzchała, Daszkiewicz, & Lenartowicz, ) and after ejaculation (Wagner, Buettner, & Burns, ). ROS are molecular mediators and play pivotal roles in spermatozoa, where this phenomenon has been shown to participate in the many events that lead to fertilisation, such as sperm hyperactivation, capacitation, interaction to pellucid zone and acrosome reaction (Banihani, Abu‐Alhayjaa, Amarin, & Alzoubi, ; Moretti et al, ).…”