One of the main causes of male infertility is the negative effects of oxidative stress. Follicle-stimulating hormone (FSH) plays an essential role in spermatogenesis, as well as in the maintenance of sperm DNA integrity. This study aimed to determine whether the recombinant human follicle-stimulating hormone (rhFSH) treatment of sperm parameters could positively affect sperm DNA and oxidative DNA fragmentation in oligozoospermia infertile men. Materials and Methods: This interventional study

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... carried out on a sample of 50 oligozoospermia infertile men. To this end, sperm DNA fragmentation and ROS as an oxidative stress marker were measured before and after treatment with the rhFSH sperm parameters. Results: The sperm parameters (concentration, mobility, and morphology) were significantly different in the oligozoospermia infertile patients before and after the rhFSH treatment (p<0.05). Moreover, sperm DNA fragmentation had a significant decrease in the patients after the FSH treatment (p<0.05). In addition, the ROS level in sperm, and the malondialdehyde level of seminal plasma significantly decreased after the treatment (P<0.05). Conclusion: The findings indicated that the rhFSH treatment significantly improved the sperm parameters. Further, the treatment led to a meaningful reduction of sperm DNA fragmentation and oxidative stress in the oligozoospermia infertile patients. Similarly, the malondialdehyde concentration markedly decreased in correlation with DNA fragmentation after the rhFSH treatment.