Abstract
Objective To summarize the role of reactive oxygen species (ROS) in the pathophysiology of human reproduction. Design Review of literature. Setting Fertility research center and obstetrics and gynecology department in a tertiary care facility. Result(s) ROS plays an essential role in the pathogenesis of many reproductive processes. In male-factor infertility, oxidative stress attacks the fluidity of the sperm plasma membrane and the integrity of DNA in the sperm nucleus. Reactive oxygen species induced DNA damage may accelerate the process of germ cell apoptosis, leading to the decline in sperm counts associated with male infertility. ROS mediated female fertility disorders share many pathogenic similarities with the ones on the male side. These similarities include a potential role in the pathophysiology of endometriosis and unexplained infertility. High follicular fluid ROS levels are associated with negative IVF outcomes, particularly in smokers. Moreover, oxidative stress may be responsible in hydrosalpingeal fluid mediated embryotoxicity as well as poor in vitro embryonic development. Conclusion(s) High levels of ROS are detrimental to the fertility potential both in natural and assisted conception states.
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