The breasts undergo changes in response to factors such as genetics, the ageing process, pregnancy and breastfeeding, weight gain or loss, and hormonal fluctuations. Breasts that were once firm and shapely often begin to sag giving them a loose or heavy appearance. A mastopexy, commonly known as a breast lift, is a surgical procedure designed to raise and reshape the breasts while removing any excess skin. This results in firmer, shapelier breasts, which will improve body contours and give the breasts a more youthful appearance. Often, a mastopexy is combined with breast augmentation, which involves the use of implants to increase volume.