Post-pregnancy belly is characterised by flabby and sagging skin that is caused by over-stretching of the skin surface. During pregnancy, as the baby grows, the skin produces excess tissue, due to which you do not have a flat belly again after giving birth. An additional thing that often appears on the abdomen after pregnancy is stretch marks. Both the stretched skin and the white lines on the abdomen can be removed by aesthetic medicine methods. The most popular treatment for flabby skin is Hifu II.