Associations of selected meiotic program initiation pathway gene polymorphisms and the risk of idiopathic male infertility.

SNPs, single-nucleotide polymorphisms; OR, odds ratios; CI, confidence interval.aSubjects consisted of proven fertility men with semen volume ≥2 ml, sperm counts ≥20×106/ml and sperm motility ≥50% motile sperm.bSubjects consisted of idiopathic infertile men with sperm counts 6/ml.cSubjects consisted of idiopathic infertile men with sperm counts = 0/ml.dSubjects consisted of idiopathic infertile men with sperm counts from 0.1 to 20×106/ml.eSubjects consisted of idiopathic infertile men with sperm counts ≥20×106/ml.fORs were obtained from multivariate logistic regression analysis.gTwo-sided χ2 test for genotype distributions between cases and controls.