Observational studies support a direct association between poor DHA status and increased risk of maternal depression and childhood behavioral disorders such as attention-deficit hyperactivity disorder (ADHD), according to a recent study in the American Journal of Clinical Nutrition.
So the last thing you want to do when you are pregnant is avoid healthy fats such as fish oil. This is also very important when you are breastfeeding, as the fatty acids your child receives from the breast milk are dependent on your diet for that day.