A new study has shown that 22% of children of mothers who have mental health problems a year after giving have behavioral problems by the age of 3.

A year after delivery, half the mothers had a condition in at least one of the three categories -- mental health, substance abuse, domestic violence -- and 22 percent of the children had at least one type of behavior problem such as aggression, anxiety-depression, or inattention/hyperactivity. The more problems reported by a mother, the more likely her child was to develop behavior problems by age 3. (Forbes.com)