Cited by 33Ovarian function and disordersDiabetes, Cardiovascular Risks, and LipoproteinsGenetic and Kidney Cyst Diseases

Impact of metformin on the clinical and metabolic parameters of women with polycystic ovary syndrome: a systematic review and meta-analysis of randomised controlled trials

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Abdalla, Mohammed Altigani, Shah, Najeeb, Deshmukh, Harshal, Sahebkar, Amirhossein, Östlundh, Linda, Al-Rifai, Rami H., Atkin, Stephen L., Sathyapalan, Thozhukat·2022·Therapeutic Advances in Endocrinology and Metabolism

Abstract

Context: Polycystic ovary syndrome (PCOS) is one of the commonest endocrine disorders affecting women of reproductive age, and metformin is a widely used medication in managing this condition. Aim: To review the available literature comprehensively on the therapeutic impact of metformin on the clinical and metabolic parameters of women with PCOS. Data source: We searched PubMed, MEDLINE, Scopus, Embase, Cochrane Library and the Web of Science and selected sources for grey literature from their inception to April 2020. An updated search in PubMed was performed in June 2022. Data synthesis: Two reviewers selected eligible studies and extracted data, and the review is reported following the 2020 Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). Results: In 24 eligible randomised controlled trials (RCTs) involving 564 participants who received metformin therapy, metformin was associated with significant reduction in body weight by 3.13 kg (95% CI: −5.33, −0.93), body mass index (BMI) by 0.82 kg/m² (95% CI: −1.22, −0.41), fasting blood glucose [standardised mean difference (SMD): −0.23; 95% CI: −0.40, −0.06], low-density lipoprotein cholesterol (LDL-C) (SMD: −0.41; 95% CI: −0.85, 0.03), total testosterone (SMD: −0.33; 95% CI: −0.49, −0.17), androstenedione (SMD: −0.45; 95% CI: −0.70, −0.20), 17-hydroxyprogesterone (17-OHP) (SMD: −0.58; 95% CI: −1.16, 0.00) and increase the likelihood of clinical pregnancy rate [odds ratio (OR): 3.00; 95% CI: 1.95, 4.59] compared with placebo. Conclusion: In women with PCOS, metformin use has shown a positive impact in reducing body weight, BMI, total testosterone, androstenedione, 17-OHP, LDL-C, fasting blood glucose and increasing the likelihood of pregnancy in women with PCOS.

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References 68 · Cited by 33

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  1. [1]Barnard L Ferriday D Guenther N, et al. Quality of life and psychological well being in polycystic ovary syndrome. Hum Reprod 2007; 22: 2279– 2286. 17537782
  2. [2]Ndefo UA Eaton A Green MR. Polycystic ovary syndrome: a review of treatment options with a focus on pharmacological approaches. P T 2013; 38: 336– 355. 23946629 PMC3737989
  3. [3]Witchel SF Oberfield SE Pena AS. Polycystic ovary syndrome: pathophysiology, presentation, and treatment with emphasis on adolescent girls. J Endocr Soc 2019; 3: 1545– 1573. 31384717 PMC6676075
  4. [4]Wu S Divall S Wondisford F, et al. Reproductive tissues maintain insulin sensitivity in diet-induced obesity. Diabetes 2012; 61: 114– 123. 22076926 PMC3237653
  5. [5]Nisenblat V Norman RJ. Androgens and polycystic ovary syndrome. Curr Opin Endocrinol Diabetes Obes 2009; 16: 224– 231. 19390322
  6. [6]Salley KE Wickham EP Cheang KI, et al. Glucose intolerance in polycystic ovary syndrome: a position statement of the Androgen Excess Society. J Clin Endocrinol Metab 2007; 92: 4546– 4556. 18056778
  7. [7]Garruti G Depalo R Vita MG, et al. Adipose tissue, metabolic syndrome and polycystic ovary syndrome: from pathophysiology to treatment. Reprod Biomed Online 2009; 19: 552– 563. 19909598
  8. [8]Essah PA Wickham EP Nestler JE. The metabolic syndrome in polycystic ovary syndrome. Clin Obstet Gynecol 2007; 50: 205– 225. 17304037
  9. [9]Wadden TA Berkowitz RI Womble LG, et al. Randomized trial of lifestyle modification and pharmacotherapy for obesity. N Engl J Med 2005; 353: 2111– 2120. 16291981
  10. [11]Abdalla MA Shah N Deshmukh H, et al. Effect of pharmacological interventions on lipid profiles and C-reactive protein in polycystic ovary syndrome: a systematic review and meta-analysis. Clin Endocrinol 2021; 96: 449– 459. 34779013
  11. [12]Jensterle M Kravos NA Ferjan S, et al. Long-term efficacy of metformin in overweight-obese PCOS: longitudinal follow-up of retrospective cohort. Endocr Connect 2020; 9: 44– 54. 31829964 PMC6993269
  12. [13]Diamanti-Kandarakis E Dunaif A. Insulin resistance and the polycystic ovary syndrome revisited: an update on mechanisms and implications. Endocr Rev 2012; 33: 981– 1030. 23065822 PMC5393155
  13. [14]Sam S Dunaif A. Polycystic ovary syndrome: syndrome XX. Trends Endocrinol Metab 2003; 14: 365– 370. 14516934
  14. [15]Zhou G Myers R Li Y, et al. Role of AMP-activated protein kinase in mechanism of metformin action. J Clin Invest 2001; 108: 1167– 1174. 11602624 PMC209533
  15. [16]Viollet B Guigas B Sanz Garcia N, et al. Cellular and molecular mechanisms of metformin: an overview. Clin Sci 2012; 122: 253– 270. PMC3398862 22117616
  16. [17]Wheaton WW Weinberg SE Hamanaka RB, et al. Metformin inhibits mitochondrial complex I of cancer cells to reduce tumorigenesis. Elife 2014; 3: e02242. PMC4017650 24843020
  17. [18]Miller RA Chu Q Xie J, et al. Biguanides suppress hepatic glucagon signalling by decreasing production of cyclic AMP. Nature 2013; 494: 256– 260. 23292513 PMC3573218
  18. [19]Woo SL Xu H Li H, et al. Metformin ameliorates hepatic steatosis and inflammation without altering adipose phenotype in diet-induced obesity. PLoS ONE 2014; 9: e91111. PMC3956460 24638078
  19. [20]Geerling JJ Boon MR van der Zon GC, et al. Metformin lowers plasma triglycerides by promoting VLDL-triglyceride clearance by brown adipose tissue in mice. Diabetes 2014; 63: 880– 891. 24270984
  20. [21]Kumar P Khan K. Effects of metformin use in pregnant patients with polycystic ovary syndrome. J Hum Reprod Sci 2012; 5: 166– 169. 23162354 PMC3493830
  21. [22]Jorquera G Echiburu B Crisosto N, et al. Metformin during pregnancy: effects on offspring development and metabolic function. Front Pharmacol 2020; 11: 653. 32625081 PMC7311748
  22. [23]Abdalla MA Shah N Deshmukh H, et al. Impact of pharmacological interventions on anthropometric indices in women with polycystic ovary syndrome: a systematic review and meta-analysis of randomized controlled trials. Clin Endocrinol 2022; 96: 758– 780. 34918367
  23. [25]Higgins JP Thomas J Chandler J, et al. Cochrane handbook for systematic reviews of interventions. New York: John Wiley & Sons, 2019.
  24. [27]Das S Chatterjee SS. Cabell’s blacklist: a new way to tackle predatory journals. Indian J Psychol Med 2018; 40: 197– 198. 29962584 PMC6008990
  25. [28]Higgins JP Altman DG Gotzsche PC, et al. The Cochrane Collaboration’s tool for assessing risk of bias in randomised trials. BMJ 2011; 343: d5928. PMC3196245 22008217
  26. [30]Amiri M Golsorkhtabaramiri M Esmaeilzadeh S, et al. Effect of metformin and flutamide on anthropometric indices and laboratory tests in obese/overweight PCOS women under hypocaloric diet. J Reprod Infertil 2014; 15: 205– 213. 25473629 PMC4227978
  27. [31]Eisenhardt S Schwarzmann N Henschel V, et al. Early effects of metformin in women with polycystic ovary syndrome: a prospective randomized, double-blind, placebo-controlled trial. J Clin Endocrinol Metab 2006; 91: 946– 952. 16352680
  28. [32]Heidari B Lerman A Lalia AZ, et al. Effect of metformin on microvascular endothelial function in polycystic ovary syndrome. Mayo Clin Proc 2019; 94: 2455– 2466. 31806099 PMC8050832
  29. [33]Kazerooni T Shojaei-Baghini A Dehbashi S, et al. Effects of metformin plus simvastatin on polycystic ovary syndrome: a prospective, randomized, double-blind, placebo-controlled study. Fertil Steril 2010; 94: 2208– 2213. 20079899
  30. [34]Kocak M Caliskan E Simsir C, et al. Metformin therapy improves ovulatory rates, cervical scores, and pregnancy rates in clomiphene citrate-resistant women with polycystic ovary syndrome. Fertil Steril 2002; 77: 101– 106. 11779598
  31. [35]Lingaiah S Morin-Papunen L Risteli J, et al. Metformin decreases bone turnover markers in polycystic ovary syndrome: a post hoc study. Fertil Steril 2019; 112: 362– 370. 31227287
  32. [36]Morin-Papunen L Rantala AS Unkila-Kallio L, et al. Metformin improves pregnancy and live-birth rates in women with polycystic ovary syndrome (PCOS): a multicenter, double-blind, placebo-controlled randomized trial. J Clin Endocrinol Metab 2012; 97: 1492– 1500. 22419702
  33. [38]Sova H Puistola U Morin-Papunen L, et al. Metformin decreases serum 8-hydroxy-2’-deoxyguanosine levels in polycystic ovary syndrome. Fertil Steril 2013; 99: 593– 598. 23122829
  34. [39]Underdal MO Stridsklev S Oppen IH, et al. Does metformin treatment during pregnancy modify the future metabolic profile in women with PCOS? J Clin Endocrinol Metab 2018; 103: 2408– 2413. 29659896
  35. [40]Vanky E Salvesen KA Heimstad R, et al. Metformin reduces pregnancy complications without affecting androgen levels in pregnant polycystic ovary syndrome women: results of a randomized study. Hum Reprod 2004; 19: 1734– 1740. 15178665
  36. [41]Zain MM Jamaluddin R Ibrahim A, et al. Comparison of clomiphene citrate, metformin, or the combination of both for first-line ovulation induction, achievement of pregnancy, and live birth in Asian women with polycystic ovary syndrome: a randomized controlled trial. Fert Steril 2009; 91: 514– 521. 18321486
  37. [42]Chou KH von Eye Corleta H Capp E, et al. Clinical, metabolic and endocrine parameters in response to metformin in obese women with polycystic ovary syndrome: a randomized, double-blind and placebo-controlled trial. Horm Metab Res 2003; 35: 86– 91. 12734787
  38. [43]Rotterdam EA-SPCWG. Revised 2003 consensus on diagnostic criteria and long-term health risks related to polycystic ovary syndrome. Fertil Steril 2004; 81: 19– 25. 14711538
  39. [45]Moghetti P Castello R Negri C, et al. Metformin effects on clinical features, endocrine and metabolic profiles, and insulin sensitivity in polycystic ovary syndrome: a randomized, double-blind, placebo-controlled 6-month trial, followed by open, long-term clinical evaluation. J Clin Endocrinol Metab 2000; 85: 139– 146. 10634377
  40. [46]Anaforoglu I Algun E Incecayir O, et al. Higher metabolic risk with National Institutes of Health versus Rotterdam diagnostic criteria for polycystic ovarian syndrome in Turkish women. Metab Syndr Relat Disord 2011; 9: 375– 380. 21657888
  41. [48]Trolle B Lauszus FF Frystyk J, et al. Adiponectin levels in women with polycystic ovary syndrome: impact of metformin treatment in a randomized controlled study. Fertil Steril 2010; 94: 2234– 2238. 20189560
  42. [49]Vandermolen DT Ratts VS Evans WS, et al. Metformin increases the ovulatory rate and pregnancy rate from clomiphene citrate in patients with polycystic ovary syndrome who are resistant to clomiphene citrate alone. Fertil Steril 2001; 75: 310– 315. 11172832
  43. [50]Chen Z Zhang M Qiao Y, et al. Effects of letrozole in combination with low-dose intramuscular injection of human menopausal gonadotropin on ovulation and pregnancy of 156 patients with polycystic ovary syndrome. Pak J Med Sci 2016; 32: 1434– 1438. 28083040 PMC5216296
  44. [51]Yarali H Yildiz BO Demirol A, et al. Co-administration of metformin during rFSH treatment in patients with clomiphene citrate-resistant polycystic ovarian syndrome: a prospective randomized trial. Hum Reprod 2002; 17: 289– 294. 11821265
  45. [52]Lord J Thomas R Fox B, et al. The effect of metformin on fat distribution and the metabolic syndrome in women with polycystic ovary syndrome: a randomised, double-blind, placebo-controlled trial. BJOG 2006; 113: 817– 824. 16827766
  46. [53]Ng EH Wat NM Ho PC. Effects of metformin on ovulation rate, hormonal and metabolic profiles in women with clomiphene-resistant polycystic ovaries: a randomized, double-blinded placebo-controlled trial. Hum Reprod 2001; 16: 1625– 1631. 11473953
  47. [54]Palomba S Falbo A Russo T, et al. Insulin sensitivity after metformin suspension in normal-weight women with polycystic ovary syndrome. J Clin Endocrinol Metab 2007; 92: 3128– 3135. 17519312
  48. [55]Naka KK Kalantaridou SN Kravariti M, et al. Effect of the insulin sensitizers metformin and pioglitazone on endothelial function in young women with polycystic ovary syndrome: a prospective randomized study. Fertil Steril 2011; 95: 203– 209. 20684955
  49. [56]Nestler JE. Metformin in the treatment of infertility in polycystic ovarian syndrome: an alternative perspective. Fertil Steril 2008; 90: 14– 16. 18550055 PMC2495076
  50. [57]Legro RS Barnhart HX Schlaff WD, et al. Clomiphene, metformin, or both for infertility in the polycystic ovary syndrome. N Engl J Med 2007; 356: 551– 566. 17287476
  51. [58]Harborne LR Sattar N Norman JE, et al. Metformin and weight loss in obese women with polycystic ovary syndrome: comparison of doses. J Clin Endocrinol Metab 2005; 90: 4593– 4598. 15886247
  52. [59]Akram T Hasan S Imran M, et al. Association of polycystic ovary syndrome with cardiovascular risk factors. Gynecol Endocrinol 2010; 26: 47– 53. 19639500
  53. [60]Kaya MG Yildirim S Calapkorur B, et al. Metformin improves endothelial function and carotid intima media thickness in patients with PCOS. Gynecol Endocrinol 2015; 31: 401– 405. 25791462
  54. [61]Mancini F Cianciosi A Reggiani GM, et al. Endothelial function and its relationship to leptin, homocysteine, and insulin resistance in lean and overweight eumenorrheic women and PCOS patients: a pilot study. Fertil Steril 2009; 91: 2537– 2544. 18462732
  55. [62]Mather KJ Kwan F Corenblum B. Hyperinsulinemia in polycystic ovary syndrome correlates with increased cardiovascular risk independent of obesity. Fertil Steril 2000; 73: 150– 156. 10632431
  56. [63]Kim JJ Choi YM. Dyslipidemia in women with polycystic ovary syndrome. Obstet Gynecol Sci 2013; 56: 137– 142. 24327994 PMC3784112
  57. [64]Wild RA. Dyslipidemia in PCOS. Steroids 2012; 77: 295– 299. 22197663
  58. [65]Sin HY Kim JY Jung KH. Total cholesterol, high density lipoprotein and triglyceride for cardiovascular disease in elderly patients treated with metformin. Arch Pharm Res 2011; 34: 99– 107. 21468921
  59. [66]Sharpe A Morley LC Tang T, et al. Metformin for ovulation induction (excluding gonadotrophins) in women with polycystic ovary syndrome. Cochrane Datab Syst Rev 2019; 12: CD013505. PMC6915832 31845767
  60. [67]Abdel-Maboud M Menshawy A Hasabo EA, et al. The comparative effectiveness of 55 interventions in obese patients with polycystic ovary syndrome: a network meta-analysis of 101 randomized trials. PLoS ONE 2021; 16: e0254412. PMC8289030 34280195

Authors
Abdalla, M. A., Shah, N., Deshmukh, H., Sahebkar, A., Östlundh, L., Al-Rifai, R. H., Atkin, S. L., & Sathyapalan, T.
Affiliations
  • University of Hull (GB)
  • Mashhad University of Medical Sciences (IR)
  • United Arab Emirates University (AE)
  • Institute of Public Health, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
  • Royal College of Surgeons in Ireland - Bahrain (BH)
  • Hull Royal Infirmary (GB)
Corresponding author
Sathyapalan, Thozhukat
Venue
Therapeutic Advances in Endocrinology and Metabolism
Published
2022-01
Volume
13
Pages
20420188221127142-20420188221127142
ISSN
  • 2042-0188 (ISSN-L)
  • 2042-0196
OpenAlex
W4306167962
Cited by
33
References
68
Citations by year
2026: 10 · 2025: 10 · 2024: 11 · 2023: 2
FWCI
0.93
Type
journal article
Language
en
Open access
Locations
  • Therapeutic Advances in Endocrinology and Metabolism (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • Repository@Hull (Worktribe) (University of Hull) (submittedVersion, cc-by-nc)
  • UWA Profiles and Research Repository (UWA) (submittedVersion, cc-by-nc)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Ovarian function and disorders
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Kidney Cyst Diseases
Keywords
metformin, polycystic ovary syndrome, weight loss, body mass index, fasting blood glucose, testosterone, androstenedione, 17-hydroxyprogesterone, LDL cholesterol, clinical pregnancy rate, insulin sensitivity, insulin resistance, ovulation induction, ovulation rate, hirsutism, hyperandrogenism, insulin-stimulated glucose uptake

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