As you've probably noticed, puberty comes with all kinds of changes — including the way your body looks and even the way you might think it smells. These changes are a normal part of becoming a woman, ...

A night terror (also called sleep terror) is similar to a nightmare, but is far more dramatic. A child having a night terror wakes up screaming and is impossible to ...

An erection is when the penis gets hard because sponge-like tissue in it fills with blood. Erections tend to make the penis get bigger and stand away from the body. Erections can go away on their own ...

¿Qué hacen los cartílagos de crecimiento? Los cartílagos de crecimiento son una de las formas en las que crecen los huesos. En general, cada hueso largo tiene dos cartílagos de crecimiento. Estos ...

Herd immunity is the idea that when many people are immune to (protected from) a contagious infection, it's harder for that infection to spread in a community. Antibody shots against specific germs ...

MIBG (meta-iodobenzylguanidine) is a molecule that doctors combine with low-dose radioactive iodine to look for neuroblastoma. After it’s injected into a patient, the MIBG is absorbed by neuroblastoma ...

People who have symptoms of COVID-19 or who test positive for it (even without symptoms) should stay home and away from others to prevent spreading the infection. This is known as isolation. Keeping ...

Nighttime feedings may be over, but you might still be struggling to get your toddler to sleep. Learn how to instill good sleep habits early so your toddler can sleep well.

Girls have lots of questions about the body changes of puberty. When will my breasts grow? What's the "normal" age to get your first period? Watch this video and find out!

Most cars have air bags that can protect adults and teens if a crash happens. But young children can be injured or even killed if they ride in the front passenger seat and an air bag opens. Air bags ...

How much do you know about your heart? Find out by taking this quiz!

Most blood tests take only a few minutes. They’re done at some doctor’s offices, and at community labs, diagnostic centers, and hospitals. A doctor, nurse, or phlebotomist (fleh-BOT-eh-mist, someone ...