KMID : 1037120230410010014
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The World Journal of Men¡Çs Health 2023 Volume.41 No. 1 p.14 ~ p.48
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Impact of Antioxidant Therapy on Natural Pregnancy Outcomes and Semen Parameters in Infertile Men: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
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Agarwal Ashok
Cannarella Rossella Saleh Ramadan Harraz Ahmed M. Kandil Hussein Salvio Gianmaria Boitrelle Florence Kuroda Shinnosuke Farkouh Ala¡¯a Rambhatla Amarnath Zini Armand Colpi Giovanni Gul Murat Kavoussi Parviz Hamoda Taha Abo Almagd Abdel Meguid Ko Edmund Calik Gokhan Toprak Tuncay Pinggera Germar Michael Park Hyun-Jun Ghayda Ramy Abou Minhas Suks Busetto Gian Maria Bak©¥rc©¥oglu Mustafa Emre Kadioglu Ates Chung Eric Russo Giorgio Ivan Calogero Aldo E. Ambar Rafael F. Jayasena Channa N Shah Rupin
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Abstract
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Purpose
Seminal oxidative stress (OS) is a recognized factor potentially associated with male infertility, but the efficacy of antioxidant (AOX) therapy is controversial and there is no consensus on its utility. Primary outcomes of this study were to investigate the effect of AOX on spontaneous clinical pregnancy, live birth and miscarriage rates in male infertile patients. Secondary outcomes were conventional semen parameters, sperm DNA fragmentation (SDF) and seminal OS.
Materials and Methods
Literature search was performed using Scopus, PubMed, Ovid, Embase, and Cochrane databases. Only randomized controlled trials (RCTs) were included and the meta-analysis was conducted according to PRISMA guidelines.
Results
We assessed for eligibility 1,307 abstracts, and 45 RCTs were finally included, for a total of 4,332 infertile patients. We found a significantly higher pregnancy rate in patients treated with AOX compared to placebo-treated or untreated controls, without significant inter-study heterogeneity. No effects on live-birth or miscarriage rates were observed in four studies. A significantly higher sperm concentration, sperm progressive motility, sperm total motility, and normal sperm morphology was found in patients compared to controls. We found no effect on SDF in analysis of three eligible studies. Seminal levels of total antioxidant capacity were significantly higher, while seminal malondialdehyde acid was significantly lower in patients than controls. These results did not change after exclusion of studies performed following varicocele repair.
Conclusions
The present analysis upgrades the level of evidence favoring a recommendation for using AOX in male infertility to improve the spontaneous pregnancy rate and the conventional sperm parameters. The failure to demonstrate an increase in live-birth rate, despite an increase in pregnancy rates, is due to the very few RCTs specifically assessing the impact of AOX on live-birth rate. Therefore, further RCTs assessing the impact of AOX on live-birth rate and miscarriage rate, and SDF will be helpful.
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KEYWORD
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Antioxidants, Male infertility, Meta-analysis, Pregnancy, Semen parameters, Sperm DNA fragmentation
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