Late pregnancy emotional instability easy to cry, common reasons are unable to adapt to physiological changes, the results of the maternity test so that pregnant women worried about anxiety, the pressure of life and work can not be relieved, the body hormone level changes, sleep quality is poor and so on. 1. Can not adapt to physiological changes: with the increase in months of pregnancy, all parts of the pregnant woman’s body have different degrees of fat, especially the stomach is getting bigger and bigger, legs are getting thicker and thicker, will affect the pregnant mother’s mood. 2. The results of maternity tests make pregnant women worried and anxious: throughout the pregnancy to experience a number of maternity tests, when the results of such and such a problem, will worry about the baby’s health and the accumulation of worries, this situation may not be able to see out of the outsiders, but it will make the pregnant woman’s emotions highly tense. 3. Stress can not be relieved: many pregnant women during pregnancy life and work pressure, if not relieved in time, this pressure on the pregnant woman’s psychological and physiological are extremely unfavorable. 4. Hormonal changes in the body caused by mood changes: pregnant women’s mood changes during pregnancy is due to the impact of changes in the level of hormones in the body after pregnancy, can also make pregnant women feel irritable, pessimistic and even insomnia, palpitations and other discomforts. 5. Poor sleep quality: pregnant women as a sensitive group, not only because of poor sleep or insomnia and easy emotional instability, but also affect the stable development of the fetus. When emotional instability occurs during pregnancy, it is recommended to consult a psychiatrist to give positive guidance and treatment.