Depression During Pregnancy May Increase Risk of Preterm Birth

CNN: Depression during pregnancy doubles risk of preterm birth, by Anne Harding:

Depressed moms-to-be are more likely than nondepressed women to have a preterm birth, and the worse their mood, the greater their risk, says a new study published in Human Reproduction. In fact, women in the study who were severely depressed during early pregnancy more than doubled their risk of giving birth to premature babies.

The reasons why aren't entirely clear, but the researchers don't think antidepressants are to blame. Only 1.5 percent of women were taking the drugs during pregnancy, and excluding them from the study didn't change the results.