In the UK a few years ago, there was a campaign which showed a baby sat down with a diaper on. Next to that baby was a tiny rock of crack cocaine. The caption underneath said "this is enough crack cocaine to get a baby addicted for life". Yes, unborn babies can become addicted to drugs and can suffer extremely painful withdrawal symptoms as a result. I don't think the mothers should be jailed for it though, I fail to see how that would help. I just think they should be given the help they need in order to care for their child.