Seated hamstring curl with weight machine

Twin to twin Transfusion Syndrome (TTTS)

Twin-to-twin transfusion syndrome (TTTS) is a rare condition that occurs only in identical twins while they are in the womb. This animation explains the syndrome and how it is corrected.

• Pregnancy

Reverse crunch with fitness ball

You can do many core exercises with a fitness ball. See the reverse crunch.

LASIK eye surgery

Watch this video to see how LASIK eye surgery is done.

Ambien (zolpidem): Tips for Insomia Prevention and Use of Ambien

How to best prevent insomnia, and if needed, how Ambien works to help with sleep

• Ambien

How to Recognize Performance-Enhancing Steroid Use in Teens

Tips on recognizing steroid abuse in teens and the serious side effects that may follow