After pregnancy physiological, psychological, social environment and other factors can lead to pregnant women depressed, want to cry, early intervention can alleviate the bad mood, the main reasons are as follows: 1, physiological factors: women’s bodies after pregnancy endocrine system has undergone great changes, hormone metabolism is prone to imbalance. In addition, due to the growth and development of the fetus caused by the physical appearance of pregnant women appear larger changes, these may affect the mood of pregnant women; 2, psychological factors: some pregnant women face the role of the conversion of a moment can not adapt to, mixed feelings. The family’s view of the gender of the fetus and contradictions will subconsciously bring pressure to the pregnant woman. If the pregnancy is unplanned, the pregnant woman will also worry about whether the health of the fetus is good; 3, the social environment factors: such as work pressure, economic pressure, interpersonal relationship pressure, life pressure and so on. Physiological, psychological, social and environmental factors together lead to the pregnant woman’s anxiety and depression during pregnancy, and crying is one of the natural outflow and expression of anxiety and depression. Mood changes of pregnant women will have a greater impact on the fetus, such as frequent depression, sadness can make the fetus developmental deformities increased chances, and emotional instability during pregnancy, the fetus after birth prone to crying, restlessness and so on. If the mood fluctuation during pregnancy is obvious, you can distract your attention through appropriate exercise, listening to music, and communicating with people more often, so as to alleviate the bad mood during pregnancy, and if there is a tendency of depression, you should intervene in psychotherapy as early as possible.