Negative association between androgen receptor gene CAG repeat polymorphism and polycystic ovary syndrome? A systematic review and meta-analysis

Rui Wang, Mark O. Goodarzi, Ting Xiong, Di Wang, Ricardo Azziz, Hanwang Zhang

Research output: Contribution to journalArticleResearchpeer-review

26 Citations (Scopus)


A number of studies focusing on the association between the exon 1 CAG repeat polymorphism of the androgen receptor (AR) gene and polycystic ovary syndrome (PCOS) have revealed conflicting results. The current systematic review and meta-analysis was conducted to quantify the strength of the association and to explore potential sources of heterogeneity that may have influenced the results. Studies matched to search terms from PubMed, EMBASE and HuGE Navigator published through to 31 January 2012 were retrieved. Data extraction from the included studies was carried out by two authors independently. Weighted mean differences (WMDs) of biallelic mean and odds ratios (ORs) of alleles and genotypes were pooled for meta-analysis. Sixteen articles reporting on 17 studies were included. In continuous data analysis, the summary WMD was 20.06 (95% confidence interval 20.29 to 0.16). In dichotomous data analysis, we divided the alleles into short and long alleles and calculated the summary ORs. No statistically significant results were identified by different comparison models or different cut-off point definitions. No publication bias was observed in continuous and dichotomous data analysis. In summary, the current systematic review and meta-analysis found that the AR CAG microsatellite repeat polymorphism is unlikely to be a major determining factor in the development of PCOS.

Original languageEnglish
Article numbergas024
Pages (from-to)498-509
Number of pages12
JournalMolecular Human Reproduction
Issue number10
Publication statusPublished - 1 Oct 2012
Externally publishedYes


  • Androgen receptor
  • CAG repeat
  • Genetic polymorphism
  • Meta-analysis
  • Polycystic ovary syndrome

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