Depressed mothers are disturbing their babies' sleep, not the other way round, a new study has revealed. The journal Child Development published research by Pennsylvania State University which examined 45 mothers and their babies for a week. Results showed that children with the most disturbed sleep had mothers with more symptoms of depression. This link was caused by depressed mothers going to their children's beds and picking up, feeding and cuddling their babies when the intervention didn’t appear to be needed. The study suggests that mothers were disturbing their baby's sleep in search of emotional comfort for themselves, not because the baby needed it. These findings draw attention to the need for support for parents who are feeling depressed.