Sperm DNA Fragmentation (SDF) is being recognized as a new parameter of sperm quality complementary to the standard semen analysis and as a potential predictor of fertility (Esteves et al., 2021;Lewis, 2015; Zini & Agarwal, 2018). Three main mechanisms are considered as origins of SDF. Firstly, transient DNA breaks may be produced during spermiogenesis by a type II topoisomerase, TOP2B, to relax supercoiling and facilitate the replacement of histones by protamines (Laberge & Boissonneault, 2005). In defective spermiogenesis, DNA breaks can persist, not joined and consequently detected as DNA fragmentation in mature sperm cells (Leduc et al., 2008). Secondly, DNA breaks can be the consequence of DNA attack by excessive local levels of reactive oxygen species (ROS) or other free radicals, overcoming antioxidant defences, that is oxidative stress, during or after sperm maturation (Aitken, 2020;Henkel et al., 2005). Finally, massive DNA breakage may be an endpoint from a particular apoptotic-like process, due to activated DNase activity (Sakkas et al., 2003; Zini & Agarwal, 2018).While andrological or systemic diseases may increase SDF through one or more of the mechanisms highlighted above, it is also possible that exposure to hazardous agents, such as toxic chemicals, pesticides, antitumor drugs or radiations, may trigger the SDF process, possibly by means of its secondarily influence on one or several sperm targets, resembling the apoptotic response from somatic cells. Thus, SDF assessment is likely to be useful in the discipline of reproductive toxicology (Evenson & Wixon, 2005).