How can researchers track where teens go when not in or near home or school to see if this movement has an impact on health-related behavior such as smoking or sexual activity" The answer is through that ubiquitous teen accessory – the cell phone.

The percentage of teens who report solely positive benefits from not having sex declines precipitously with age, according to a new study by scientists at the University of California, San Francisco.

Compared to teens from other racial and ethnic groups, Hispanic adolescents don't experience nearly the level of problems during the process of their parents' divorce or separation.

A Canadian study has confirmed what parents have long suspected: dating, sexual activity and substance use seem to make teens feel older than they really are. And, as adolescents get older, the gap between their chronological age and their self-perceived age widens.