Hey I was reading the posting for women who are pregnant and trying to quit smoking but can't. I am not a smoker, so I don't know too much about it, but I wanted to mention something that you may want to look into. My in-laws are major smokers (1-2 packs per day since their teens and now in their 50's), and they just recently purchased an "electric cigarette." It looks like a pen and you puff on it just like you would a cig, but there is no tar or smoke -- only nicotine, so it does not effect your lungs the way a normal cig would. It is also odorless so you can do it indoors and around others without having to step outside. My mother in law actually told me that she also finds it more satisfying than a regular cig and can go longer between cigs with the electric cig.
Also, from a financial standpoint, it's cheaper. The replacement nicotine cartridges are cheaper than cigs and the initial cost of the electric cig is quickly recouped. I figured it out for my mother in law and they make their money back in a month or two.
Now, I am not encouraging indulging in nicotine while pregnant, because of course your baby will be born with the addiction and go through a cold-turkey withdrawl at first, but I thought it would be a futher help to your babies (to eliminate the smoke and tar) and especially if it helps you cut down even more (go longer between cigs). Still, PLEASE check with your doctor first. I am not a doctor and maybe there is something I don't know about the electric cig.