Men who don't get along with a sibling might be at higher risk for depression, new research shows.

Depressed people get more of a psychological boost from marriage than people who aren't depressed, even though depressed people tend to have poorer quality marriages, a U.S. study finds.

At your child's next visit to the pediatrician, the usual checklist of questions might include a new one: Do you have a gun in the house?

First-born children possess IQs that are 2.3 points higher, on average, than their younger siblings, a new study contends.

While children riding in cars driven by teens are twice as likely to be injured in a crash as children in cars driven by adults, the risk of injury is 40 percent lower if the teen driver happens to be an older brother or sister, a new study finds.