The National Women's Health Information Center offers this list of risk factors for postpartum depression:

• Having a personal or family history of depression or another mental illness.
• Having insufficient support from friends and family.
• Feeling negative or anxious about pregnancy.
• Having problems in a relationship, or financial difficulties.
• Dealing with stressful life events.
• Being young during pregnancy.
• Having a substance abuse problem.

-- Diana Kohnle