Cited by 119Reproductive Health and TechnologiesReproductive Biology and FertilityOvarian function and disorders

Antioxidants for female subfertility

Open access
Showell, Marian G, Mackenzie-Proctor, Rebecca, Jordan, Vanessa, Hart, Roger J·2020·Cochrane Database of Systematic Reviews

Abstract

BackgroundA couple may be considered to have fertility problems if they have been trying to conceive for over a year with no success.This may affect up to a quarter of all couples planning a child.It is estimated that for 40% to 50% of couples, subfertility may result from factors affecting women.Antioxidants are thought to reduce the oxidative stress brought on by these conditions.Currently, limited evidence suggests that antioxidants improve fertility, and trials have explored this area with varied results.This review assesses the evidence for the effectiveness of different antioxidants in female subfertility. ObjectivesTo determine whether supplementary oral antioxidants compared with placebo, no treatment/standard treatment or another antioxidant improve fertility outcomes for subfertile women. Search methodsWe searched the following databases (from their inception to September 2019), with no language or date restriction: Cochrane Gynaecology and Fertility Group (CGFG) specialised register, CENTRAL, MEDLINE, Embase, PsycINFO, CINAHL and AMED.We checked reference lists of relevant studies and searched the trial registers. Selection criteriaWe included randomised controlled trials (RCTs) that compared any type, dose or combination of oral antioxidant supplement with placebo, no treatment or treatment with another antioxidant, among women attending a reproductive clinic.We excluded trials comparing antioxidants with fertility drugs alone and trials that only included fertile women attending a fertility clinic because of male partner infertility. Data collection and analysisWe used standard methodological procedures expected by Cochrane.The primary review outcome was live birth; secondary outcomes included clinical pregnancy rates and adverse events. Main resultsWe included 63 trials involving 7760 women.Investigators compared oral antioxidants, including: combinations of antioxidants, Nacetylcysteine, melatonin, L-arginine, myo-inositol, carnitine, selenium, vitamin E, vitamin B complex, vitamin C, vitamin D+calcium, CoQ10, and omega-3-polyunsaturated fatty acids versus placebo, no treatment/standard treatment or another antioxidant.Only 27 of the 63 included trials reported funding sources. Antioxidants for female subfertility (Review)

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  • Low-to very low-quality evidence suggests that antioxidant supplementation in women with infertility may increase pregnancy or live birth rates.

    “Low-to very low-quality evidence suggests that antioxidant supplementation in women with infertility may increase the chance of pregnancy or live birth rate (Showell 2020).”

    From Preconception lifestyle advice for people with infertility (2021) · cites this paper as Showell 2020

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Research works printed but not linked: 4

  1. Al-Alousi 2018 {published data only} Al-Alousi TA, Al-Allak MM, Aziz AA, Al Ghazali BS. The effect of omega-3 on the number of retrieved ova, fertilization rate, and embryo grading in subfertile women undergoing intracytoplasmic sperm injection. Biomedical and Pharmacology Journal 2018;11(4):2221-32.
  2. Behrouzi Lak T, Haj Shafia M, Talebi E, Bahrami Bukani M, Mehrshad A, Zarei L. Evaluation of n-acetyl cysteine effect in ovulation induction: Response of patients who are candidates for intra uterine insemination. International Journal of Fertility and Sterility 2016;10(Supplement 1):85. 2016 Global Supplement report. www.marketresearch.com/ Nutrition-Business-Journal-v2520/Global- Supplement-10063772/ 2016.
  3. Lefebvre C, Manheimer E, Glanville J. Chapter 6: Searching for studies. In: Higgins JP, Green S, editor(s). Cochrane Handbook for Systematic Reviews of Interventions Version 5.1.0 (updated March 2011). The Cochrane Collaboration, 2011. Available from handbook.cochrane.org.
  4. Reportlinker.com 2010 Reportlinkercom. Vitamin and supplement industry: market research reports, statistics and analysis, 2010. www.reportlinker.com/ci02037/Vitamin-and-Supplement.html (Accessed 26 June 20.10). RevMan 2014 [Computer program] Nordic Cochrane Centre, The Cochrane Collaboration Review Manager 5 (RevMan 5). Version 5.3. Copenhagen: Nordic Cochrane Centre, The Cochrane Collaboration, 2014.

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Authors
Showell, M. G., Mackenzie-Proctor, R., Jordan, V., & Hart, R. J.
Affiliations
  • University of Auckland (NZ)
  • Auckland City Hospital (NZ)
  • The University of Western Australia (AU)
Venue
Cochrane Database of Systematic Reviews
Publisher
Wiley
Published
2020-08-27
Volume
2026
Issue
3
ISSN
  • 1361-6137 (ISSN-L)
  • 1465-1858
OpenAlex
W4211059826
Cited by
119
References
171
Citations by year
2026: 7 · 2025: 21 · 2024: 26 · 2023: 30 · 2022: 19 · 2021: 13 · 2020: 3
FWCI
2.39
Type
journal article
Language
en
Open access
Locations
  • Cochrane Database of Systematic Reviews (publishedVersion)
  • UWA Profiles and Research Repository (UWA) (submittedVersion)
  • ResearchSpace (University of Auckland) (submittedVersion)
Funders
  • Science and Technology Commission of Shanghai Municipality
  • Shahid Beheshti University of Medical Sciences
  • Arak University of Medical Sciences
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Reproductive Health and Technologies
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Reproductive Biology and Fertility
  • Health Sciences › Medicine › Reproductive Medicine › Ovarian function and disorders
Keywords
antioxidants, female subfertility, oxidative stress, live birth, clinical pregnancy, N-acetylcysteine, melatonin, L-arginine, myo-inositol, L-carnitine, selenium, vitamin E, vitamin C, vitamin D, coenzyme Q10, omega-3 fatty acids, B vitamins, infertility treatment

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