Why (and when) does this happen?
FACT: Going from a kid body to an adult body takes around seven to eight years, and puberty is kind of like a supercharged, gun-the-engine-and-go period somewhere in the middle. “Puberty begins when your pituitary gland, the bean-shaped gland that sits at the base of your brain, starts sending out chemical messages to the rest of your body that it’s time to grow and change,” says Logan Levkoff, a health educator and co-author of Got Teens? Still, you may be wondering why you already have to shave, for example, when no one else does. And because there’s no exact timeline for puberty, seeing the range of change can be reassuring (remember: you’ll all get through it eventually!).