By literature search,114 papers for fertile male sperm quality including 256 set data were collected from 9292 persons and 11 726 assays involving 39 cities and counties.Results of analysis showed a decrease in mean concentration of sperm from 103.02×106/ml(1983)to 83. 84×106/ml(1996),sperm motility was decreasedfrom 75.11%(1982)to 67.27%(1996)and percentage of sperm with normal morphology was reduced from 85.02%(1983)to 77.89%(1996),thus showing the definite negative correlation and being statistically significant(P<0.05).Total spermcounts were decreased from 355.34×106(1984)to 262.26×106(1996)and the meanseminal volume was decreased from 3.31 ml(1981)to 2.97 ml (1996),both tending to decline bat not being statistically significant(P>0.05).It is interesting to note that although Chinese sperm quality is better,it declines significantly faster than that of western countries at the same period.It is possible that the decline of sperm quality is due to problem of environmental quality.The authors suggest the emphasis of basic research in relevant fields.
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