Postpartum depression is a severe form of depression that can develop within the first six months after giving birth. Symptoms include sadness, anxiety, restlessness and in rare cases, postpartum psychosis. It is caused by hormonal changes after childbirth and other contributing factors like stress, lack of sleep, and feelings of loss. About 10-15% of new mothers are affected. Left untreated, it can interfere with mother-child bonding and cause family distress, and increase the risk of behavioral problems in children. Treatment options include counseling, antidepressants, and lifestyle changes.