KidsHealth is the #1 most-trusted source for physician-reviewed information and advice on children's health and parenting issues. For parents, kids, teens, and educators, in English and in Spanish.

This site offers support and advice on health, emotions, and life — created for people 13–18 and approved by doctors.

Puberty (say: PYOO-ber-tee) is the name for the time when your body begins to develop and change as you move from kid to adult. We're talking about stuff like girls developing breasts and boys starting to look more like men. It helps to know about the changes that puberty causes before they happen ...

A period is when blood comes out through a girl's vagina. It is a sign that she is getting close to the end of puberty. Puberty is when your body goes from looking like a kid's into looking more like a grown-up's. There is a lot to learn about periods. …

You see it in movies all the time. Some guy gets hit right in the privates. Yow! If you're a boy, you probably already know your penis and scrotum are sensitive. Why? And more important, what do you do if you're having pain or another problem "down …

As kids grow from grade-schoolers to preteens, there continues to be a wide range of "normal" regarding height, weight, and shape. Kids tend to get taller at a pretty steady pace, growing about 2.5 inches (6 to 7 centimeters) each year. When it comes to …

As a child care provider, you play an important role in children's lives, especially when it comes to food and fitness. To make things easier on you, KidsHealth and Sesame Workshop present the Healthy Habits for Life Child Care Resource Kit.. These hands-on activities use Sesame Street characters to help you show your students how to eat right and be active.

The human body is an amazing machine. Learn more about it through movies, quizzes, articles, and more.

A lot of changes happen as you grow up, especially as you reach puberty (say: PYOO-bur-tee). This is the time when your body begins to develop and change. During puberty, t here isn't just one event or sign that you're growing up. There are lots of them, including your body growing bigger, your voice changing, and hair sprouting everywhere.

Teaching kids about their bodies and what is private can be tricky. But parents can help kids develop healthy feelings about their bodies in age-appropriate ways. This also helps kids learn what’s not OK, which can help protect them from sexual …