What is your opinion on women who smoke during pregnancy?

Gina • Due 10/02/16 with my rainbow baby 🍼🌈👶🏻
I'm not a smoker. I never have been and I never will be. But I was shopping at Babies R Us earlier and I saw a pregnant woman standing outside smoking a cigarette. My first thought was "that poor baby". I'm not a judgemental person, but are the risks of smoking during pregnancy not enough to motivate a smoking mother to quit for the sake of her baby and her well being?