POLG and varicocele: Sperm count, rapid motility and the rate of normal sperm morphology was significantly lower in the varicocele groups than in the fertile group (P =0.0003, P =0.0001, P =0.0001 respectively), but slow, nonprogressive and immotile motility between varicocele and fertile group was notable different (P= 0.1972, P= 0.1151, The frequency of the POLG gene CAG repeats in the two study populations are given in Table 2.