Postpartum Depression Highest in Fall, Winter

Ann Lukits:

Women who give birth during the fall and winter are twice as likely to suffer from postpartum depression than if they deliver in the spring, according to a study in the American Journal of Obstetrics & Gynecology. Seasonal variations in mental disorders are well documented, but few studies have examined seasonal births and postpartum depression. From 2006 to 2007, 2,318 new Swedish mothers, 76% of whom had no previous psychiatric history, completed questionnaires containing a post-natal depression scale five days, six weeks and six months after giving birth. Results showed that women who gave birth from October to December were twice as likely to develop postpartum depression at six weeks and six months than women who delivered from April to June. The risk of postpartum depression was 43% higher for women who gave birth from July to September and 22% higher from January to March. There was no risk associated with deliveries from April to June. Researchers said reduced exposure to daylight may alter the activity of serotonin, causing mood disorders. Mothers giving birth in the fall might benefit from closer postpartum support and follow-up from doctors, they said.