Offspring of mothers who drank alcohol while breastfeeding had lower cognition.
An Australian observational study followed more than 5000 children from infancy to 11 years old--approximately 4700 were ever breast fed. Infants whose mothers drank alcohol while breast-feeding had lower cognitive scores by age 6. These differences were no longer significant by age 10-11, and were independent of prenatal alcohol use.
PositiveTip: Alcohol use while breastfeeding can significantly impair the mother's ability to self-regulate and make safe choices for herself and/or her child.