Prenatal Smoke Exposure can cause Behavioral Problems

Don't know if this pertains to secondhand smoke as well, but I would assume any smoke isn't good. From Medscape:

November 9, 2009 (Honolulu, Hawaii) — Prenatal tobacco exposure (TE) has been linked to irritability in neonates, poor attention and information processing in infants, and impulsivity in preschool children," according to new research presented here at the American Academy of Child & Adolescent Psychiatry 56th Annual Meeting.

"We found that even in the first year of life, we can see differences in attention and irritability and in regulation of emotions," lead investigator Sandra A. Wiebe, PhD, assistant professor in the Department of Psychology at the University of Alberta, Canada, told Medscape Psychiatry.

"Then at age 3, we saw that kids with prenatal [TE] seem to have trouble waiting for an award, which ties in with findings that smoking during pregnancy can have specific impact on the parts of the brain that are involved in regulating behavior," she added.