Patterns of violence in romantic relationships often start young. And the effects of dating violence in the teen years carry over into the adult years.

Teenagers' parents can make a difference in whether their kids drink, smoke or use marijuana, based on past research. But the parents of teens' friends play a part too.

What’s the best way to teach kids how to become responsible drinkers in adulthood?  Have the family and environment be a good, consistent example.

The summer months are a time for rest and relaxation. For some teens though, they can also be a time for risk taking and substance abuse.

Ready for some good news about teenagers and smoking and drinking? Kids in the U.S. are doing less of both than their peers across the pond.

Despite the disturbing images being added to cigarette packs and the Surgeon General's warnings against smoking while pregnant, some women are lighting up while pregnant anyway.

Children exposed to as little as half an alcoholic drink a day in utero - even if they didn't have fetal alcohol syndrome - appeared to suffer in their achievement test scores.

Forming a close relationship with your teenager might have its ups and downs, but research suggests open communication promotes individual decision-making, even if the talk is not all that agreeable.  

A study finds that by the age of 16, bad habits and lifestyles are at the "point of no return," especially among women.