After medication , the count of progressively motile sperm per ejaculate was increased from ( 9.82 3.72 ) x 10 ( 6 ) to ( 21.47 6.52 ) x 10 ( 6 ) ( P < 0.05 ) and the proportion of progressively motile sperm from ( 18.41 9.82 ) % to ( 28.27 4.47 ) % ( P < 0.05 ) in the VD group .