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.

So it's pretty clear that smoking while pregnant is a bad idea. But what if it's just those around you who are smoking? Does that affect unborn babies too? Possibly.

With the increase in cases of autism, researchers are constantly looking for possible causes of the condition. A new study looks at whether air pollution from traffic might play a role.

It's challenging enough to raise headstrong toddlers. But toddlers and older kids whose mothers used cocaine during pregnancy? Their behavior can be especially difficult.

Sometimes trying to address one problem can cause another. This may be the case with flame retardant chemicals. They are supposed to help prevent fires, b ut they may cause health issues.

Who is the most important parent for a child to bond with? Mom? Or Dad? The answer, it seems, is either one or both.

There are 101 reasons not to smoke while you're pregnant. But here is reason #102: there's some evidence it might change the way your child's brain works later on.

Humans can learn a lot from kangaroos. In fact, they already have, at least when it comes to giving birth to tiny preemies.

A study on how ecstasy during pregnancy might affect babies at 4 months old was published early this year. Now those babies are a year old. They're still developing slowly.

Looking forward to another fight with your toddler over what they'll eat for dinner? Take heart - the fight is worth it for your child’s smarts down the line.