The ParaGuard IUD, which releases copper into the uterine cavity, can last up to 10 years. In clinical studies, the pregnancy rate among women using the device was less than 1 pregnancy per 100 women annually.
Mark Harmel/Science Source
Members of the boys basketball team from Dimond High School in Anchorage, Alaska, celebrate their 2012 state championship victory. Psychological research shows that sports camaraderie improves teenagers' mental health.