Hey, it's a two for one day. More studies showing the detriments of smoking:

Women who smoke during pregnancy are nearly twice as likely to have children with attention-deficit/hyperactivity disorder (ADHD), a new study finds.

"This study serves to underline the fact that women who are pregnant should stop smoking," said lead researcher Dr. Karen Markussen Linnet, a pediatrician at Aarhus University Hospital in Denmark. "We are not able to make a certain conclusion, but this study points out that there is an association between smoking and ADHD."

(Billingsley, "Smoking in Pregnancy Raises ADHD Risk for Child", Forbes, Aug.1)