Prenatal depression is a kind of psychological disease during pregnancy, so it must be taken seriously. First, the main characteristics are low mood, how can not be happy, always feel sad, even pessimistic and despair. Second, the thinking will become sluggish, always feel their brain is not good, can not remember things, thinking is more difficult, patients often feel that the brain is empty, and become stupid. Third, motor inhibition, that is, do not like to exercise, will occur in the whole body lazy, walking slowly, less speech, etc.; in serious cases, there will be not eat and drink, life can not take care of themselves. Prenatal depression is more dangerous; in serious cases, it can even do harm to oneself, such as suicide and self-harm, which can easily involve the safety of the fetus.