Marihuana cause low sperm count

It's difficult to know who is at risk. Men generate new sperm daily. The researchers cautioned that there are several potential limitations to the findings, including that participants may have underreported marijuana use given its status as an illegal drug for most of the study period. Chan School of Public Health in Boston, MA, has focused on the effects that smoking marijuana has on markers of male fertility. For ages, the conventional wisdom about marijuana and male reproductive health was that one did not benefit the other. While the study was small — just 24 participants — researchers found, for the first time, that higher concentrations of tetrahydrocannabinol THC in urine corresponded to a lower sperm count.