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Can Breasts Be Different Sizes? for Kids

As breasts grow, they change shape and size. So sometimes one breast may be bigger than the other.
Male Reproductive System for Parents

The male reproductive system is made up of the parts inside and outside a male’s body that help make a baby. Learn about them and how they work.
Male Reproductive System for Teens

What makes up a guy's reproductive system and how does it develop? Find the answers to these questions and more.
Breasts and Bras for Kids

Girls grow breasts as they develop and mature. And once a girl has breasts, she probably will want to wear a bra. Find out more in this article just for kids.
Female Reproductive System for Parents

The female reproductive system is made up of the parts inside and outside a female’s body that help make a baby. Learn about them and how they work.
Female Reproductive System for Teens

Why do girls get periods? What goes on when a woman gets pregnant? What can go wrong with the female reproductive system? Find the answers to these questions and more in this article for teens.
Atrial Septal Defect (ASD) for Parents

Atrial septal defect (ASD) — also known as a "hole in the heart" — is a type of congenital heart defect. Most ASDs are diagnosed and treated successfully.
Female Reproductive System (Slideshow) for Teens

This slideshow explains how the female reproductive system works.
Well-Child Visit: 2 Years (24 Months) for Parents

Find out what this well-child visit will involve and what your child might be doing by the second year.
Eyes for Teens

Although your eyes are small, their structure is incredibly complex. Find out how they work in this body basics article.

A KidsHealth Education Partner Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.