
Breast Development. Is breast development really based on genetics? In brief: Yes You have the potential to develop the pair you have the genes for. There are some environmental or dietary factors that can interfere, but you cannot develop more than you have the genes for.There are some transient hormonal influences that can augment the process some, but to gain more, you need surgery. Dr. James Ferguson Pediatrics Board member of Texas Pediatric Society. Might going to a gym affect my breast development? No, exercise should not affect breast development in any way. However, if a woman loses a significant amount of weight, her breasts made decrease in size and/or change in position. Dr. Tom Pousti Surgery - Plastics Top Plastic Surgeon, the San Diego Region http://bit.ly/2DjImA0