Females generally develop breasts during puberty – but you’re likely to develop at a different rate to your friends. There is no such thing as the perfect size or shape, and chances are your breasts are bigger, smaller and different in shape to your friends. Don’t worry about comparing yourself to others – everyone is unique. Don’t stress if you have one boob bigger than the other too, this is pretty common.
Breasts are used to feed a baby when they are born, the breasts naturally produce milk during this time.