Here's what you should know:
* Puberty is a process: It usually starts between ages 8 and 13 for girls, and 9 and 14 for boys. But, it can happen earlier or later.
* Hair growth is part of it: Hair growth in the armpits, pubic area, and face is one of the many changes that happen during puberty.
* Don't worry: If you haven't started growing armpit hair yet, there's no need to worry. It will likely happen soon.
* Talk to a trusted adult: If you're concerned about your development, talk to your parent, guardian, or a doctor. They can answer your questions and make sure you're healthy.
Remember, everyone is different! It's perfectly normal to feel curious about your body and its changes. Just relax, be patient, and enjoy this time in your life!