Fathers in Sweden are less likely to receive a psychiatric diagnosis during their partner's pregnancy and in the months right after their child is born. But this pattern reverses over time. A new study published in JAMA Network Open reports that diagnoses of depression and stress-related conditions rise about a year after childbirth. The research was led by scientists at Karolinska Institutet in Sweden and Sichuan University in China.

"The transition to fatherhood often involves both positive experiences and a range of new stresses," says Jing Zhou, PhD student at the Institute of Environmental Medicine, Karolinska Institutet, and co-first author of the paper.…