"Even though it is hard to answer that question when age is the only source, the physicians have found a way to determine whether you have entered puberty yet or not and, in case you have, in which part of the process you are at this moment".
Karen Gravelle.

"That varies a lot. For some adolescents it takes six years whereas other run through it in only one single year. But remember that the fact that you enter this stage before or after your friends doesn't have anything to do with how fast you go trough certain processes".
Karen Gravelle.