Can a doctor tell during a pelvic exam if you've had sex? Most of the time, a doctor can't tell if a girl has had sex just from a pelvic exam (and doctors don't usually do a pelvic exam unless there's ...

Medically reviewed by: Amy W. Anzilotti, MDThis link opens in a new tab Learn About Pediatric Neurology (Brain & Nervous System Care) at Nemours Children's HealthThis link opens in a new tab Chiari I ...

What Does the Immune System Do? If you've ever wondered how your immune system works, this movie is for you!

Medically reviewed by: KidsHealth Behavioral Health ExpertsThis link opens in a new tab Learn About Behavioral Health (Psychology and Psychiatry) at Nemours Children's HealthThis link opens in a new ...

Medically reviewed by: Stephanie A. Deutsch, MDThis link opens in a new tab Learn About the Children's Advocacy Center of Delaware at Nemours Children's HealthThis link opens in a new tab Abusive head ...

Medically reviewed by: Larissa Hirsch, MDThis link opens in a new tab Learn About Cardiology (Heart Care) at Nemours Children's HealthThis link opens in a new tab The heart is an organ that’s a pump, ...

Genital herpes is a sexually transmitted disease (STD). There's no cure for genital herpes, but medicines can help control the infection. Most people with genital herpes don't have any symptoms. They ...

Medically reviewed by: Larissa Hirsch, MDThis link opens in a new tab Learn About Primary Care Pediatrics at Nemours Children's HealthThis link opens in a new tab Chiggers (also called harvest mites ...

The roller coaster hesitates for a split second at the peak of its steep track after a long, slow climb. You know what's about to happen — and there's no way to avoid it now. It's time to hang onto ...

Medically reviewed by: Larissa Hirsch, MDThis link opens in a new tab Learn About Ophthalmology (Eye Care) at Nemours Children's HealthThis link opens in a new tab A tear duct is a small tube that ...

Vaping is the inhaling of an aerosol (mist) created by an electronic cigarette (e-cigarette) or other vaping device. E-cigarettes (often called vape pens) are battery-operated vaping devices that heat ...

Medically reviewed by: KidsHealth Medical ExpertsThis link opens in a new tab Learn About Primary Care Pediatrics at Nemours Children's HealthThis link opens in a new tab The urinary system (also ...