Semen parameters by rs12676 and rs1025689 genotype.

<p>Semen volume, total number of sperm per ejaculate and sperm concentration was determined by measuring the volume of the ejaculate before washing and counting the number of sperm using a hemocytometer. For rs12676 <i>N</i> = 19 (GG), 22 (GT) or 5 (TT). For rs1025689 <i>N</i> = 12 (GG), 22 (GT), 11 (CC). Values are mean ± SEM. Statistical differences among groups were tested on log 10 transformed data using ANOVA and Tukey-Kramer HSD.</p>*<p>indicates P<0.05.</p>†<p>World Health Organization reference values and 5% lower reference limit for human semen characteristics within the general population.