S.M.
Quitting is best, but if she finds that she cannot quit completely, she should cut back as much as possible. Quitting will NOT put stress on the baby. In fact, the harmful effects of smoking to a fetus are way worse than the stress of quitting. When I got pregnant with my oldest son, I was able to quit completely. A friend of mine and my husband's sister-in-law were both unable to quit. One cut back, the other kept smoking like she always had. Both children had lower than average birth weights and their arms and legs looked abnormally thin. My friend's daughter is almost 4 now and my nephew is almost 3. Both children are completely healthy. The best advice is for her to talk to her doctor and be completely honest about her smoking. It was harder for me to quit with my third child because I had a three year old and a six month old when I got pregnant. I did quit with all three of my children, but resumed after they were born. Quitting is harder than most people think, so she'll need a lot of support. Especially if she feels guilty about smoking while pregnant.