I'm not sure if I understand what you're asking, but if you're asking whether smoking weed lowers sperm count, then yes, in the studies that have been done it does indeed appear to lower sperm count. So does cigarette smoking. Both can have a negative affect on sperm motility, too, which means that the action of the sperm cells is slower than it should be or irregular in some way in comparison to that of non-weed and non-cigarette smokers.

Sperm count and motility are both very sensitive to external environmental factors. Everything from body temperature to alcohol to even a poor diet can affect the quality of sperm.