Impact of Antioxidant Therapy on Natural Pregnancy Outcomes and Semen Parameters in Infertile Men: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
- Author:
Ashok AGARWAL
1
;
Rossella CANNARELLA
;
Ramadan SALEH
;
Ahmed M. HARRAZ
;
Hussein KANDIL
;
Gianmaria SALVIO
;
Florence BOITRELLE
;
Shinnosuke KURODA
;
Ala’a FARKOUH
;
Amarnath RAMBHATLA
;
Armand ZINI
;
Giovanni COLPI
;
Murat GÜL
;
Parviz KAVOUSSI
;
Taha Abo-Almagd Abdel-Meguid HAMODA
;
Edmund KO
;
Gokhan CALIK
;
Tuncay TOPRAK
;
Germar-Michael PINGGERA
;
Hyun Jun PARK
;
Ramy Abou GHAYDA
;
Suks MINHAS
;
Gian Maria BUSETTO
;
Mustafa Emre BAKIRCIOĞLU
;
Ates KADIOGLU
;
Eric CHUNG
;
Giorgio Ivan RUSSO
;
Aldo E. CALOGERO
;
Rafael F. AMBAR
;
Channa N. JAYASENA
;
Rupin SHAH
Author Information
- Publication Type:Original Article
- From:The World Journal of Men's Health 2023;41(1):14-48
- CountryRepublic of Korea
- Language:English
-
Abstract:
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.
