Whoa, wait: where did those statistics come from?

(click ads, via) Ads for the South African National Council on Alcohol and Drug Dependence warning woman about drinking during pregnancy. (L) "50% of children born with foetal alcohol syndrome will grow up to engage in risky sexual behaviour." (R) "60% of children born with foetal alcohol syndrome will grow up to engage in criminal activity."
Those random numbers feel a bit high, yes? Nothing in the ads or on the website backs them up. Ad agencies wouldn't just make up stats, would they? Also: what exactly is "risky sexual behaviour?" The art direction and photography are nice, though. Previously in: anti-alcohol advertising.