Postpartum depression is a mood disorder that can occur within the first year after giving birth. Hippocrates first described depression, which he called melancholia. Postpartum depression is triggered by hormonal and psychological changes following childbirth. Symptoms include sadness, anxiety, irritability and reduced concentration. Left untreated, postpartum depression can negatively impact both mother and child. Proper screening and treatment with SSRIs like sertraline can effectively treat postpartum depression while allowing for breastfeeding.