17 Year Old Female - Boobs Are Saggy and Uneven?

I would recommend waiting until your growth stabilizes and then re-evaluate your situation in 1-2 years. Your desire for nursing following pregnancy should be taken into consideration. Improved symmetry will likely invovle a combination of breast reduction and/or lift as long as you do not require augmentation.

I agree with most of the answers here.  Uneven breasts don't just get better on their own.  If your breasts are uneven and saggy, surgery may be the answer for you.  Usually, one requires augmentation of both breasts and lift of one or both. Get a couple of opinions from plastic surgeons.  Your situation may not be straight forward and you want to make sure to do the right thing.

Unfortunately, breast asymmetry and sagging is very common. Treatment for cosmetic improvement will require a  breast lift which treats the sagging aspect.  A small reduction can be performed on the larger side to even out the differences. Scars on the breast would be the trade off, but they fade over time. Certainly, as you continue to age, have children, and weight fluctuation, there is always the possibility for appearance changes in the breasts. I would consult with a board certified plastic surgeon to see what would work best to enhance your look. 

If you have this much assymetry at age 17, you probably won't get magically better.  We often see young women who have this problem.  Each case is individualized because the breasts are so different.  Some women just need a lift on one side, an enlargement on oneside, or a reduction on one side.  Still others will need surgery on both breasts to get the best result. 

Plan on making an appointment with a board certified plastic surgeon in your area and you can discuss options.

Good luck,

Dr T

Every one develops differently and the breasts are no exception.  There is no reason why your breasts developed the way that they did.  The good news is that this problem can be corrected.  I am sure that this effects your self-confidence.  The first step is to seek the care of an experienced plastic surgeon who can explain your alternatives as well as the risks and benefits.  If you are a minor then you may need to have a parent accompany you to the consultation.