Mental illness often runs in families. Children are generally at a higher risk for a mental disorder if a parent has one. These patterns can show up very early in children's lives.

Anxiety tends to be more common among women than men, according to various studies. But researchers don't know why. Now they're learning that it may have to do with baby girls' environment.

Often called the "love hormone" or "trust hormone," oxytocin is a chemical that helps parents and children bond to one another and works on children's emotional development.

A review of twenty years worth of research reveals that physically punishing kids probably does more harm than good and appears to increase kids' aggression.