mine stayed kinda the same after 9 weeks just dropped and acquired a better shape!
but then I had 255 to stay natural as I was a AA cup before! – now a 30D 
I think they will change more if they are under the muscle as the skin has to stretch to accommodate them [they start off tighter] – also if they are bigger in CC it will take longer for your skin to take to new size and will slowly increase!