My wife doesn't smoke anyways so, no, she didn't smoke when she was pregnant. She went a little overboard though(at least in my opinion) and gave up everything: alcohol (of course), caffiene, any medicine, sushi, etc. Shit, she wouldn't even touch a piece of chocolate during her pregnancy because it would contain caffeine. No meds during the birth either, no epidural no nothing. She also exercised 4 times a week at the gym. Watching her big pregnant belly battling up the stairmaster for 30mins was always fun

Funny thing, our daughter was born 7 weeks early and only weighed 4lbs. 13 oz. She was perfectly healthy though and we were able to bring her home right away. We always figure that everything my wife did, while not preventing the early birth, helped keep our tiny daughter healthy once she was born. And, by the time she was two she'd caught up to, actually passed, other kids in terms of height and weight.

As far as a woman smoking during her pregnancy is concerned, I always figure it this way: Would you blow a hit into an infant's face? No? Than why do it when they're still inside?