Government experts also admit that pot has no permanent effect on male or female reproductive system.
Several studies have pointed to a major marijuana cigarette may be back, suppressive effect on male testicular function.
A recent study by Dr. Robert Block has refuted earlier research suggesting that pot lowers testosterone or other sex hormones in men or women.
However, heavy alcohol drinking is known to lower testosterone levels and cause impotence. A couple of lab studies indicate that very high marijuana cigarette smoking might lower sperm count. However, surveys of chronic smokers turned up no evidence of infertility or other defects.
Less is known about the effects of marijuana cigarette on human females. Some animal studies suggest that pot might temporarily lower fertility and increased risk of fetal loss, but evidence of dubious relation to men.
One human study suggested that pot may mildly disrupt ovulation. It is possible that adolescents are peculiarly vulnerable to hormonal disruptions from pot. However, not one case of impaired fertility always occur in men who either sex
