Personality instability and introversion are the risk factors of postpartum depression. Liu Youhua wrote in the "new progress of postpartum depression nursing" that postpartum complications, delayed delivery, dystocia and surgical delivery are the causes of postpartum depression that can not be ignored. Because of the pain and discomfort of childbirth, it makes the parturient feel nervous and scared, which leads to the increase of physical and psychological stress, and causes psychological imbalance, thus inducing the emergence of postpartum depression. Introverted and neurotic women are prone to postnatal depression. Postpartum sleep status is a significant predictor of postpartum depression. The worse sleep status is, the more likely postnatal depression is