The DOI matches its Crossref record; 66 of the 69 references it cites were found in a registry or an index.
A systematic review of the reproductive system effects of metformin in patients with polycystic ovary syndrome
Open accessAbstract
Objective To review the effectiveness of metformin in restoring regular menstrual cycles and ovulation and achieving pregnancy in women with polycystic ovary syndrome (PCOS).Design Systematic review of pertinent studies identified using the bibliographic databases MEDLINE and EMBASE. References of selected articles identified were hand-searched for additional relevant citations.Patient(s) Women with PCOS undergoing treatment with metformin alone, metformin combined with other methods of ovulation induction such as clomiphene citrate (CC) or gonadotropin injections, or metformin combined with in vitro fertilization (IVF).Result(s) Thirty published studies were included in the overall review. Studies consisted of 12 randomized controlled trials, two cohort studies, and 16 uncontrolled descriptive studies. Due to a strong variability in the use of metformin according to study population, exposure, and outcome of interest, it was not possible to combine the data of the 12 randomized controlled trials to perform a meta-analysis. Limited data on predominately obese PCOS patients demonstrate that metformin alone improves both restoration of regular menses and spontaneous ovulation, but there are no data supporting an improvement in pregnancy rate. The addition of metformin to CC results in an improved ovulation and pregnancy rate in both unselected and CC-resistant PCOS women. There are insufficient data to make any conclusions on the effect of metformin on FSH ovulation induction or IVF.Conclusion(s) The effectiveness and role of metformin in the treatment of PCOS anovulatory infertility in clinical practice is difficult to assess from currently available research. Further well-designed prospective, perhaps multicenter, randomized controlled trials with the primary end point of pregnancy or live-birth rate are required.
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“Studies examining the reproductive effects of metformin in PCOS suggest benefits but are limited by study design. 223”
From Assessment and management of polycystic ovary syndrome: Summary of an evidence-based guideline (2011) · cites this paper as [223]
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Cites
Users' Guides to the Medical Literature
Guyatt, G. H. (1993) · JAMA · doi:10.1001/jama.270.17.2096 · Cited by 3,083
Insulin Resistance and the Polycystic Ovary Syndrome: Mechanism and Implications for Pathogenesis
Dunaif, A. E. (1997) · Endocrine Reviews · doi:10.1210/edrv.18.6.0318 · Cited by 2,776
Franks, S. (1995) · New England Journal of Medicine · doi:10.1056/nejm199509283331307 · Cited by 2,463
Profound Peripheral Insulin Resistance, Independent of Obesity, in Polycystic Ovary Syndrome
Dunaif, A., Segal, K. R., Futterweit, W., & Dobrjansky, A. (1989) · Diabetes · doi:10.2337/diab.38.9.1165 · Cited by 1,967
Bailey, C. J., & Turner, R. C. (1996) · New England Journal of Medicine · doi:10.1056/nejm199602293340906 · Cited by 1,726
The Existence of Publication Bias and Risk Factors for Its Occurrence
Dickersin, K. (1990) · JAMA: The Journal of the American Medical Association · doi:10.1001/jama.1990.03440100097014 · Cited by 1,417
Users' Guides to the Medical Literature
Guyatt, G. H. (1993) · JAMA · doi:10.1001/jama.270.21.2598 · Cited by 1,185
Andrology: Polycystic ovary syndrome: the spectrum of the disorder in 1741 patients
Balen, A. H., Conway, G. S., Kaltsas, G., Techatraisak, K., Manning, P. J., West, C., & Jacobs, H. S. (1995) · Human Reproduction · doi:10.1093/oxfordjournals.humrep.a136243 · Cited by 1,060
Prevalence of polycystic ovaries in women with anovulation and idiopathic hirsutism.
Adams, J., POLSON, D. W., & Franks, S. (1986) · BMJ · doi:10.1136/bmj.293.6543.355 · Cited by 975
Users' Guides to the Medical Literature
Oxman, A. D. (1994) · JAMA · doi:10.1001/jama.1994.03520170077040 · Cited by 925
Research works printed but not linked: 3
- Crave, 1995, Effects of diet and metformin administration on sex hormone-binding globulin, androgens, and insulin in hirsute and obese women, J Clin Endocrinol Metab, 80, 2057
- Rull, 2001, Metformin reverses anovulation in hyperinsulinemic patients with polycystic ovary syndrome, Diabetol Croatica, 30, 19
- El-Biely, 2001, The use of metformin to augment the induction of ovulation in obese infertile patients with polycystic ovary syndrome, Middle East Fertil Soc J, 6, 43
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Franks, S. (1997) · Archives of Disease in Childhood · doi:10.1136/adc.77.1.89 · Cited by 802
Tang, T., Lord, J. M., Norman, R. J., Yasmin, E., & Balen, A. H. (2012) · Cochrane Database of Systematic Reviews · doi:10.1002/14651858.cd003053.pub5 · Cited by 698
Metformin in polycystic ovary syndrome: systematic review and meta-analysis
Lord, J. M., Flight, I. H. K., & Norman, R. J. (2003) · BMJ · doi:10.1136/bmj.327.7421.951 · Cited by 786
Jonard, S. (2004) · Human Reproduction Update · doi:10.1093/humupd/dmh010 · Cited by 513
Broekmans, F. J., Knauff, E. A. H., Valkenburg, O., Laven, J. S. E., Eijkemans, M. J. C., & Fauser, B. C. J. M. (2006) · BJOG An International Journal of Obstetrics & Gynaecology · doi:10.1111/j.1471-0528.2006.01008.x · Cited by 445
Metadata
- Authors
- Costello, M. F., & Eden, J. A.
- Affiliations
- Royal Hospital for Women (AU)
- Corresponding author
- Costello, Michael F
- Venue
- Fertility and Sterility
- Publisher
- Elsevier BV
- Published
- 2003-01
- Volume
- 79
- Issue
- 1
- Pages
- 1-13
- ISSN
- 0015-0282 (ISSN-L)
- OpenAlex
- W2026898125
- Cited by
- 224
- References
- 69
- Citations by year
- 2025: 1 · 2024: 3 · 2023: 2 · 2022: 1 · 2021: 6 · 2020: 4 · 2019: 8 · 2018: 3 · 2017: 7 · 2016: 6 · 2015: 7 · 2014: 4 · 2013: 7 · 2012: 18
- FWCI
- 5.22
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Fertility and Sterility (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Reproductive Medicine › Ovarian function and disorders
- Health Sciences › Medicine › Reproductive Medicine › Reproductive Biology and Fertility
- Health Sciences › Medicine › Reproductive Medicine › Reproductive Health and Technologies
- Keywords
- metformin, polycystic ovary syndrome, ovulation induction, clomiphene citrate, gonadotropin injection, in vitro fertilization, anovulatory infertility, menstrual cycle restoration, pregnancy rate, follicle-stimulating hormone, obesity
- MeSH terms
- Clomiphene, Drug Therapy, Combination, Female, Fertilization in Vitro, Follicle Stimulating Hormone, Humans, Infertility, Female, Metformin, Ovulation Induction, Polycystic Ovary Syndrome, Pregnancy, Randomized Controlled Trials as Topic, MEDLINE
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