1.Heredity:the genes for your breast size may have come not just from your mother, but also from your father’s side, or from more distant relatives. It is very possible that many girls will have a different size than their mother or their sisters.
2.Body frame and size: normally smaller girls with a more fragile looking body frame tend to have smaller breasts as well. Of course heredity can change this statement.
3. Your weight:
this is something that you can influence up to a certain point. If you want to grow your breasts, one way to do it is put on some weight. Lots of teenagers are worrying about their weight. Some of them go so extreme that they become
anorexic.
Please remember if you loose weight between age 13-18, it is possible that your breasts will never reach their potential size or that they will never come back as big as they were before your dieting.
The best thing you can do is to prevent becoming overweight by eating right and exercising a lot. It is very important to eat healthy. Don’t live on hamburgers, French fries and sodas or chips etc. In the end you will want to diet and loose weight. Then you will end up loosing weight from your breasts first.
My doctor said and it is so true: if you want your boobs to get bigger, you can never let your stomach feel hungry. My doctor said I should put on more weight. She also told me the way: eat a lot of healthy stuff and exercise a lot. She said exercising is very important otherwise I will get too much excess weight on my butt and want to go on a diet again, which will mean loosing weight from my breasts again. Check your BMI here if you are using the metric system.
4. Exercise and Posture:
it will not help to build in more fat tissues but it will give you a lift. Firmer chest muscles mean rounder, firmer looking breasts. Click here how.
Some girls experience breast growth when they take birth controll pills. It never happened to me but I have friends who did experience growth. You should never take contraceptives to increase your breast size.
Breast enlargement pills can contain ingredients, which will have a little affect on your hormones. Do not expect 2-3 cup size growth but 1 or a half cup is possible.
You can see on many forums that young girls around age 13-14 are already worrying about the size of their breasts. If you are that young, you must have patience! The development of your actual breast size will finish somewhere between 17-19 years of age. Do not take breast enlargement pills if you are still developing!