12 1/2 year old daughter has asymmetrical breasts. is it possible they will even out. one is at least a full cup behind the other?

Breast Asymmetry: If there are differences now they may persist over time but that will take several years to answer that question. These problems can be very concerning and you certainly can take her for a consult to begin a working relationship with a plastic surgeon. Fat grafting with or without the use of brava treatment maybe of great benefit down the road.

BREAST SIZE: It is normal for the other breast to be smaller than the other one. Later on the size will catch up after pregnancy ?

Very possible: Breast development, or thelarche, may begin as early as 8 or 9 and is the earliest sign of puberty. During the next 4-5 years, pubarche occurs, increase height and weight, and last, menstruation. , or menarche. Breasts will develop during that time. So any difference in breast size can certainly even out by the time menarche occurs. As girls get older, breast self exams needs to be taught.

Unlikely: Breast asymmetry while generally very common is less common with the size discrepancy you are describing. I would check to make sure she isn't an obligate sleeper on the smaller breast (lies prone on the smaller breast). Growth hormone production is greatest during sleep and the smaller breast will not get the same blood flow and hormonal delivery if it is compressed nightly for many hours.

Most likely not: They will likely remain asymmetrical. As long as she has normal musculature and upper arm development (polands syndrome) no intervention is advised until completion of maturity. At that time you must assess her degree of tolerance of the asymmetry. If unbearable she may decide if she wants the larger breast made smaller or the smaller breast made larger or something in between - many options exist.

Maybe but Unlikely: You won't know for several years when the breast stop developing. If it is causing her problems, a plastic surgery consultation may help to outline the possible treatment options. This way she knows there are options, but usually it is best to wait for breast development to stop before intervening.