Postpartum Depression Affects Dads, Too About 1 in 10 show symptoms, says new study By John Johnson, Newser Staff Posted May 18, 2010 1:00 PM CDT 11 comments Comments Postpartum depression affects new dads, too, says a new study. (Shutterstock) (Newser) – Postpartum depression doesn't just hit new moms. A new study suggests that 1 in 10 fathers—about half the rate for women—are afflicted, reports Live Science. Generally, it's most common when the baby is 3 to 6 months old, and the symptoms manifest themselves differently in guys, who become more irritable and angry than women. "Depression affects both parents and both parents should be on the lookout for it," says the lead researcher, whose work appears in the Journal of the American Medical Association. Whether it's the mom or dad with the depression, however, it likely means bad news for the child, who is more prone to emotional problems later.