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    Impact of Varicocele Repair on Assisted Reproductive Technique Outcomes in Infertile Men: A Systematic Review and Meta-Analysis
    (Korean Soc Sexual Medicine & Andrology, 2024) Palani, Ayad; Cannarella, Rossella; Saleh, Ramadan; Salvio, Gianmaria; Harraz, Ahmed M.; Crafa, Andrea; Bahar, Fahmi
    Purpose: In this systematic review and meta-analysis, we investigated assisted reproductive technology (ART) success in in- fertile men with clinical varicocele and abnormal semen parameters who underwent varicocele repair (VR) before the ART procedure as compared to those who did not. Materials and Methods: A comprehensive search of the Scopus, PubMed, Embase, and Cochrane Library databases was con- ducted using a specific query string to identify studies examining the impact of VR on ART outcomes, including fertilization rate, clinical pregnancy, pregnancy loss, and live-birth rate, until October 2023. Outcomes were analyzed based on the type of ART. Studies on VR in infertile men with non-obstructive azoospermia and those who underwent ART only due to female factor infertility were excluded from the study. Results: Out of 1,554 articles reviewed, only 9 met the inclusion criteria for the study. All the included articles were obser- vational studies. The variability in study quality in the included literature resulted in a moderate overall risk of bias. Data analysis showed that for intrauterine insemination, there was no difference in the clinical pregnancy rate (odds ratio [OR] 1.01, 95% confidence interval [CI]: 0.42, 2.45; p=0.97). However, for intracytoplasmic sperm injection (ICSI), men with VR showed a significant improvement in fertilization rate (mean difference 10.9, 95% CI: 5.94, 15.89; p<0.01), clinical pregnan- cy rate (OR 1.38, 95% CI: 1.07, 1.78; p=0.01) and live-birth rate (OR 2.07, 95% CI: 1.45, 2.97; p<0.01), compared to men who did not undergo VR. Conclusions: The findings of this systematic review and meta-analysis suggest that VR has a positive impact on pregnancy and live birth rates after ICSI. However, biases like small sample sizes and heterogeneous populations highlight the need for larger, well-designed prospective studies to validate these findings.