What happens if you smoke and drink during a teen pregnancy?

Baby smokes/drinks: Cigarette smoke has been shown to reduce the eventual size of baby and accelerate the aging of the placenta, where it can reduce blood flow. The alcohol crosses into baby and turns into formaldehyde as it breaks down.It has a toxic effect on cells.Depending on the amount and timing it can produce birth defects and subtle forms of brain injury.It is likely the cause of some of the ADD/ADHD kids.