He expresses his distress by crying. It is said that when the parent responds and fills the baby’s needs, the adult starts to create in the baby’s brain the networks of cells that help him to learn to soothe himself.
لكنَّ بعض الابحاث الاخيرة تشير الى انه عندما يكون المولود جائعا او منزعجا ،‏ يفرز جسمه ما يسمى « هرمونات الإجهاد » .‏