[needuteets]

The best things a corrective bra does are to encourage upright posture and provide comfort by relieving stress on the back muscles. A corrective bra won't do anything to prevent breast sagging.

I don't think a corrective bra or any kind of bra is going to help you avoid sagging when growing. On the contrary I think you would probably be better off without a bra during the growth process.

yes, I think you are right, it's exactly what I thought. 
It just came to mind because chiyomilk was recommending it to holds the fat, but I think it'll do the oppositein term of sagging. 
Thank you for your response.