MT-ND1 and Reduced sperm motility: Sequence analysis of the ND1 gene in asthenozoospermia samples yielded ten SNPs which were detected, six of which were synonymous mutations at nucleotides T3396C, T3423C, C3594T, G3693A, G3705A, and A4104G, and the others were non-synonymous mutation at positions T3398C, T3821C, G4048A, and insertion (T) 4169.