Hi I am a 44 year old woman. After my son s birth in 2006 I experienced big breasts for the first time. I was a very nice 34 B cup size, but now I m a 40 D in which case my one breast is a full cup size bigger than the other one. My son did not wanted to be breastfeed after numerous attempts by nurses and myself. I recently lost weight and I also got rid of some weight there. However, I suddenly am experience growing breasts although there is no weight gaining. I had a hysterectomy in 2011 and are on hormonal medication. What can be the cause?