Maternal smoking linked to higher incidence of congenital heart defects in offsprings

Maternal cigarette smoking in the first trimester was associated with a 20 to 70 percent greater likelihood that a baby would be born with certain types of congenital heart defects, according to a study by the Centers for Disease Control and Prevention. Congenital heart defects are the most common type of birth defects, contributing to approximately 30 percent of infant deaths from birth defects annually.
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http://www.cdc.gov/media/releases/2011/p0228_smokingpregnancy.html?source=govdelivery