Does smoking weed kill sperm?

Heavy marijuana use has been linked to lower sperm count and sperm quality due THC's interference with the sperm enzyme cap, the acrosome. Essentially, this causes sperm to use up all of their available energy before ever reaching the egg for fertilization. read more

Oct. 13, 2003 -- Smoking marijuana makes sperm less fertile -- even if the woman is the one who smokes it, a new study shows. Marijuana-smoking college men volunteered for the study led by Lani J. Burkman, PhD, director of andrology at the University of Buffalo School of Medicine and Biomedical Sciences. read more