Pregnancy vomiting at night at 12 weeks pregnant is related to early pregnancy reaction and emotions may be related. In general, in the beginning of 6 weeks of pregnancy may appear early pregnancy reaction began to vomit, vomiting and HCG elevation has a relationship with the early pregnancy is more obvious, 8 ~ 10 weeks to reach the peak, but in 12 weeks at night vomiting is also normal, some pregnant women’s vomiting will continue throughout the pregnancy. Pregnancy vomiting and pregnant women’s mood is a certain relationship, emotional depression, poor physical quality, pregnancy vomiting will be more obvious, but also more frequent, so pregnancy to do a good job of care, to ensure that pregnant women’s physical and mental health. If the pregnancy vomiting is not very obvious, it does not affect their own eating, do not need special intervention. However, if the vomiting is severe, you can go to the hospital to avoid electrolyte disorders caused by severe vomiting, and use antiemetic drugs to intervene and receive fluids to replenish nutrients. In the early stages of pregnancy, regular checkups are needed to observe the development of the fetus.