The nest is empty: Parents grapple with mixed emotions after children move out

It's that time of year when many parents across the U.S. see their kids head off to college or leave home to start their working lives. For parents and guardians, experts say, the separation from their children can cause mixed feelings of loss, grief, loneliness, relief and freedom and can lead to unhealthy thoughts and behaviors.

They're the classic signs of what is known as “empty nest syndrome.”