RESUMO
Introduction: Although studies have shown that bariatric surgery can have a positive effect on the patient's sexual function, there are still disagreements and contradictions in this regard. The present study is aimed to evaluate semen parameters, hormonal changes of FSH, LH, testosterone, and libido following bariatric surgery. Methods: The present research as a prospective study was performed on 20 male candidates for bariatric surgery referred to Golestan and Aria hospitals in Ahvaz in 2021. Semen parameters (volume, count, motility, and the percentage of sperm with normal morphology), hormonal profile (including FSH, LH test hormones), and sexual function were evaluated using the International Index of Erectile Function (IIEF-5) questionnaire before and 6 months after the surgery. Results: The results of this study indicated that semen parameters did not change significantly 6 months after surgery in comparison with before the surgery (P < 0.05). After the operation, just the total level of testosterone increased significantly (2.23 nmol/L vs. 2.74, P = 0.009). However, LH and FSH levels did not change significantly six months after surgery (P = 0.858 and P = 0.287). The results indicated significant improvement in IIEF score after the operation (P = 0.011). Conclusion: The findings of the present study indicated that the decrement of weight as a result of bariatric surgery had a favorable effect on the levels of serum testosterone and sexual performance, while semen parameters did not improve after surgery.