Breast only go one way - Down!
From the day that you develop your breasts to the day of your demise, breasts will move in one direction and that is down. Certain things that you do can slow the process, such as wearing a bra, healthy living and minimizing large weight gains and losses.
The things that make the process happen faster include pregnancy, breast feeding, large weight gains or losses, going braless, smoking and jogging or exercising without good support.
With regard to getting pregnant without...