Attachment is a deep, lasting bond that develops between a caregiver and child during the baby’s first few years of life. Loving attachment between a baby and caregiver is critical to the growth of a baby’s body and mind. The brain’s ability to regulate emotions and respond to stress can be damaged if a baby does not have a strong bond with a parent. This can result in lifelong problems. Babies who have this bond and feel loved have a better chance to grow up to be adults who trust others and know how to return affection.