The length of time that a breast lift (mastopexy) will last depends on several factors.
1. The amount of elasticity of your skin. The loss of skin elasticity is what leads to droopy breasts. After a breast lift, the skin quality is not changed so their is still a risk of developing some drooping. The sag rarely returns to the level that it was before surgery but how long the breasts stays perky can vary.
2. The technique used for the breast lift. There are several techniques used to lift the breast. Any technique that only removes skin will not last very long unless used in the appropriate patient. Usually the breast tissue needs to be reshaped to give longer results. Also the addition of an implant can affect result longevity negatively as it can stretch out the breast.
3. General health factors such as smoking, diabetes, etc can affect skin quality and long-term results.'
4. Future pregnancy or significant weight changes will also negatively affect results.