Would you confront a pregnant woman that is smoking?

You are in a public place, you see a clearly pregnant woman smoking. Do you mind your own business and continue about your day or do you go talk to her about it? And what is your reasoning behind your decision? How far does a human’s responsibility go?

Caution: this is not a pro-choice vs. anti-choice argument. She is not aborting the fetus. But smoking can cause serious abnormalities to the baby.

Last part of the question is a poll – Are you pro-choice or anti-choice? Like I said before, this has nothing to do with the title question, I just want to see whether there is any correlation to your answers and to your opinion about abortion. You do not need to explain this opinion, though feel free to if you want to.