Abdominoplasty or "tummy tuck" is a cosmetic surgery procedure used to make the abdomen thinner and more firm. The surgery involves the removal of excess skin and fat from the middle and lower abdomen in order to tighten the muscle and fascia of the abdominal wall. This type of surgery is usually sought by patients with loose or sagging tissues after pregnancy or major weight loss. Abdominoplasty operations vary in scope and are frequently subdivided into categories. Depending on the extent of the surgery, a complete abdominoplasty can take from 1 to 5 hours. A partial abdominoplasty (mini-tuck abdominoplasty) can be completed between 1 and 2 hours.