Why are my breasts uneven?

Breast Asymmetry or different sizes of breasts is quite common. One of the explanation for this is that girls tend to have more breast tissue cells on one side. Normally, the other breast starts to blossom, shortly after, though it can take its due course to even out. Also, because breasts are made of mammary glands tissues and fats, so it is natural to have different amounts in each. However, if one breast becomes suddenly bigger it is best to contact your gynaecologist.