What are major risk factors for postpartum depression?

Past History: Far and away, the largest risk factor for post-partum depression is a prior personal history of a major depressive episode, major mood episode such as mania or bipolar disorder, or a prior psychotic episode. To a lesser extent, a family history of any of the above increases the risk.

Postpartum depressio: Risk factors are; history of depression, low self esteem, cigarette smoking, childcare stress, formula feeding instead of breast feeding, lack of social support, anxiety or depression during pregnancy, life stress, poor marital relationship, low socioeconomic status, single marital status, unplanned or unwanted pregnancy.