This is what I've concluded in my research; since breasts are fatty tissue the only way you can actually change their size without surgery is by gaining weight or buying one of those suction cup bras wich supposedly stimilates the growth of the tissue. The result isnt drastic (one cup size at most if I remember correctly) and in my opinion, not quite worth $2,500 and 10 weeks of dedication to wearing it.
I recently lost a significant amount of weight and the place I miss it most is my chest, its hard to lose something that once made me feel so confident. Part of me considers surgery, and the other part thinks I'm crazy for even thinking about it.
Anyways, wish you luck & a big bust

lol