The simple reason women want to get a breast augmentation is that they are dissatisfied with their breast size, according to the American Society of Plastic Surgeons. Augmentation makes breasts bigger and fuller. Some women want breast augmentation to improve the balance of their figure or to enhance their self-image. Other women want the surgery to restore breast volume after pregnancy or weight loss. Women also get implants to reconstruct their breast or breasts after a mastectomy.