the following significant changes were noted over the time period : the mean seminal volume decreased from 3.79 ml to 3.42 ml ( p less than 0.05 ) , the mean sperm count decreased from 125.4 mill/ml to 78.0 mill/ml ( p less than 0.001 ) and the proportion of double sperm heads increased from 0.52 % to 1.51 % ( p less than 0.001 ) .
C0037868
sperm
C0037844
the