Study provides robust evidence of increased risk in full siblings, suggesting both genetic and shared environmental influences
Mount Sinai researchers have found for the first time that a woman is more than 10 times more likely to develop postpartum psychosis if her sister had experienced the condition, compared to a woman with a sister who did not. The findings, which were published May 19 in the American Journal of Psychiatry and highlighted at the American Psychiatric Association’s annual meeting press briefing the same day, suggest both genetic and shared environmental influences.