I heard marijuana use by teenage girls may impair hormone production, menstrual cycles, and fertility. Is this true?
Also unproven and unfounded, but there is no data available to tell either way, (and it won’t be coming from the U.S. — current U.S. laws prohibit research on women.)
This is the female version of the boy’s “It’ll turn you into a sissy” tactic. As far as anyone knows, it is only a scare tactic.