Breast enlargement surgery involves using breast implants to achieve fuller breasts. Some women have breast augmentation surgery to improve their self-image. Some feel dissatisfied because the size of their breasts do not meet expectations. Others want to bring balance to a breast that is somewhat smaller than the other is. Often women want the procedure to restore their natural breast volume, which may have decreased because of pregnancy, weight loss, aging or even breast cancer surgery. A surgeon performs the procedure in a surgical facility under a light where an anesthesiologist administers a general and local anesthetic for the surgery, which lasts from one to two hours. The surgeon enlarges the breasts by placing soft implants through a small incision, either though the armpit, from around the nipple or under the breast. Both saline and silicone implants are now available.