Postpartum depression (PPD) is a real illness caused by changes in biology, psychology, environment and hormones. PPD is the most common complication of childbirth. You are not alone. PPD affects up to 20% of new mothers anytime in the first year after delivery. You are not to blame. PPD can affect any new mother regardless of age, race, income, education and/or marital status. You can feel better with help. PPD can be treated with self-help techniques, social support, counseling and medication when necessary.