What is your first hand experience with smoking while being pregnant?

"After one month of trying I became pregnant and had a beautiful healthy boy!"

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How did it affect your pregnancy and how did it affect your child in the long run?
I am pregnant and not smoking, I want to get that out of the way first. The reason I ask is that I have been reading a lot of material about being pregnant, and the effects of smoking while pregnant always say, "May cause this, May cause that". There does not seem to be any definite answers about the effects and my curiosity has me wondering. Thank you for your honest answers Please no bashing, this is not a forum. Thanks!

I quit smoking the second I found out I was pregnant. At 33 weeks, I experienced horrible back pain and 5 days later they did an emergency C-section only to find that my placenta was unhealthy and 40% separated, and my daughter was tiny. She could have easily died. I could have died. Since I quit smoking 3 weeks into the pregnancy, this wasn’t the cause of my placenta separation. However, the first question out of EVERY doctor’s mouth was "Did you smoke during your pregnancy?" because it is the number one cause of placental abruption. It was the scariest thing I’ve ever been through in my life and if I had continued smoking and thought that I caused it to happen, that would have been a really hard fact to live with.
Well science has yet to prove alot of things. do you want them trying to retard kids to prove it does?
your baby gets everything from you. we do know the small amount of Nic in a used butt is enough to kill an infant.
Do you really want to spend a ton of money on smokes risking his/her whole life (special needs kids are whole lot harder to raise as well) instead of getting the things to raise the child?
do you want to say I wish i had X, it would be easier to do this, but instead i smoked.
I’ve had 4 kids and I smoked with all of them. It didn’t cause low birth weight but they all were susceptible to upper respiratory infections as children. 3 out of the 4 smoke now,but I don’t! Go figure. Other than that I didn’t see any problems.