Figure 1: The association of single nucleotide polymorphism 260 with male infertility. A forest plot in ( a ) allele model (A/G), ( b ) dominant model (AA/AG + GG), ( c ) recessive model (AA + AG/GG), ( d ) co-dominant model (AA/AG), ( e ) co-dominant model (AA/GG), ( f ) super-dominant model (AA + GG/AG). The association was indicated as odds ratio (OR) estimate with the corresponding 95% confidence interval (CI). The OR estimate of each study is marked with a solid black square. The size of the square represents the weight that the corresponding study exerts in the meta-analysis. The CIs of pooled estimates are displayed as a horizontal line through the diamond. OR <1 indicates increased risk of male infertility. A: wild type gene, G: mutant gene.