Slight mood swings of pregnant women in the early stages of pregnancy usually do not affect the health of the pregnant woman and the development of the fetus, but the persistence of large mood swings will affect the pregnant woman and the fetus. After pregnancy due to the hormone level changes in different degrees of early pregnancy reaction, causing physical discomfort, coupled with the pregnant woman worried about the development of the fetus, so it will lead to some emotional fluctuations in pregnant women. Generally small mood swings will not cause adverse effects on the health of the pregnant woman and the development of the fetus, pregnant women try to relax, family members more care, guidance can be. But if it is a continuous occurrence of anger, crying and other bad mood, it may be harmful to the health and fetal development. Continued adverse emotional effects will lead to hormone level disorders, once the hormone level disorders may affect fetal development, fetal growth retardation or fetal arrest and other adverse effects, and adverse emotions may also stimulate uterine contractions, increasing the incidence of miscarriage during pregnancy. In addition, early pregnancy anger, rage or anxiety and other bad moods will also lead to pregnant women’s plant nervous system disorders, easy to make pregnant women insomnia, dreamy or headache, dizziness and other symptoms, affecting the health of pregnant women themselves. It is recommended that pregnant women try to maintain a good mood and mentality, communicate with friends and family, and listen to more soothing music to relax in the early stages of pregnancy.