Postpartum depression is believed to be one of the most common complications after pregnancy. This type of depression often occurs within the first year after the baby is born and is most likely caused by dramatic changes in hormone levels after pregnancy. Pregnant teenagers are even more at risk for experiencing complications throughout pregnancy and parenting difficulties after delivery. Minimal research has been done on preventive ways to reduce postpartum depression in teenagers. Therefore, this study will evaluate the effectiveness of an interpersonal therapy-based program at preventing postpartum depression in financially disadvantaged pregnant teenagers.