There is no definitive end point to puberty. By 21 or so years of age (if not sooner) you probably have reached your maximum height and your penis will probably have reached its maximum length but muscle mass and body hair may continue to extend after this age and may continue into the mid thirties or perhaps even later.
It can make puberty not start or stop it when it's started. Menstruation can stop for girls.
No. Enjoy the process!
They stop growing at the end of puberty.
No, but a severe blow to the testes could effect the process of puberty.
Normally before 18 years old. But it really depends. Your ears and noses never stop growing.
No.
This is a sign that you are done with puberty.
Growth doesnt stop after puberty. Men usually continue growing until early adulthood and women stop growng a little sooner.
You cant slow it, stop it, or speed it up. Its life.
puberty ends when you are about 18 and you are almost completely grown.
Yes, it usually stops around 14 to 18.
There isn't much you can do to prevent your voice changing. It is a normal part of puberty. The only way to stop it is to stop puberty, and that has some pretty serious side effects that you don't want.