Hark! If you're a parent, you're definitely more depressed than a non-parent, says a study by Florida State University professor Robin Simon and published in the American Sociological Association's Journal of Health and Social Behavior.

Part of the problem, Simon figures, is that Americans don't get as much help at parenting as they once did, or as is the case in other countries.

"We do it in relative isolation. The onus is on us," she said. "It's emotionally draining."

The depressing results seem to be across the board in a study of 13,000 people. No type of parent reported less depression than non-parents.

"Parents have more to worry about than other people do—that's the bottom line... And that worry does not diminish over time. Parents worry about their kids' emotional, social, physical and economic well-being. We worry about how they're getting along in the world."

(Source: Kids are Depressing, Study of Parents Finds in LiveScience.com)