I had a reduction at the age of 24 due to large breasts (38 I) ,I had breasts from the time I was in the 4th grade, and as far I can tell the only thing to help with sagging is bra wearing, making sure they are well supported at all times, but thats really up to nature on what will happen with your breasts. you can feel free to PM me if you have any questions that I might be able to answer if you were interested in a breast reduction.