For new-born mothers, look for ways to shrink the stomach after giving birth. Slack belly muscles, sagging skin, and fat on the abdomen, will cause many women low self-esteem postpartum. As time goes on, the size and fat in your stomach will shrink by itself. And it must be balanced with a healthy diet and lifestyle. Some simple easy ways to shrink the stomach after childbirth, adequate sleep, breastfeeding and exercise.