For me the first month was nearly result-less. I do believe my breasts got a bit sore in month one but growth wise I saw very very minimal, if anything. Month two and now into three, however, much different. Month two showed consistent physical changes to the breast, and now being in month three, I am seeing rapid growth (hoping soon I'll fill an A cup). As to the reply of band size changing, I as well saw change within months 2-3, going from a 36 to 34 currently, and barely at 34 (going down still). Everyone is different, however (as has been said).