According to a study published in the February, 2009 issue of the journal, Pediatrics, it appears that binge drinking, defined as four or more drinks on a single occasion, by pregnant women in their second and third trimesters increased the liklihood that their children would manifest symptoms of hyperactivity disorder by age 4. Here is a snippet from the article:

After controlling for a range of prenatal and postnatal factors, any episodes of consuming 4 drinks in a day were independently associated with higher risks for mental health problems (especially hyperactivity/inattention) in girls at the age of 47 months and in both genders at 81 months. There was no association with IQ scores at 49 months after adjustment for confounders. The consumption of 4 drinks in a day continued to carry risk for mental health problems (especially hyperactivity/inattention) in the absence of regular daily drinking.

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