Smoking during pregnancy increased the risk of offspring attention-deficit/hyperactivity disorder (ADHD). The risk of ADHD was greater for children whose mothers were heavy smokers than for those whose mothers were light smokers, finds meta-analysis of studies totaling 2,998,059 participants.

About Robert Zinn

Robert Zinn, M.D., Ph.D. is a medical doctor, physician, and web entrepreneur, who, for over 15 years was employed by academic and research institutions and focused his clinical practices on very specialized patient populations, such as those with rare genetic diseases or rare cancers. He shares his knowledge through his website,

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