Here are answers to some questions many parents have about COVID-19 vaccines.

In an imperforate anus, the anal sphincter (a group of muscles in the anus that controls the release of poop) usually forms in the right place but without the normal opening.

Girls have lots of questions about the body changes of puberty, especially about breasts and first periods. Watch this video to get some answers!

It’s normal for people to masturbate. Some people do it to relieve stress or tension. It’s nothing to be ashamed of or embarrassed about.

Baths do more than keep your baby clean. They also give you a chance to bond. With a little planning and practice, both you and your baby will look forward to bath time. Here are the basics about ...

Taking an oral temperature is easy in an older, cooperative child. Most kids can have their temperature taken this way when they’re about 4–5 years old. Here's how to do it.

Just about every guy wonders how he measures up "down-there." Here's the lowdown for any guy who's ever worried about whether his penis is a normal size. There is a wide range of normal penis sizes.

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

Herd immunity is when many people are immune to a contagious infection, so it's harder for that infection to spread in a community. Learn more.

Bullying is a big problem. It can make kids feel hurt, scared, sick, lonely, embarrassed, and sad. Bullies might hit, kick, or push to hurt people, or use words to call names, tease, or scare them. A ...

Gastroenteritis (stomach flu) is a common infection that causes nausea, vomiting, diarrhea, and belly cramps.

The brain and spinal cord make up the central nervous system. Find out how they work together to control everything we do.