Morning sickness and vomiting usually occur after 6 weeks of pregnancy, which is a normal early pregnancy reaction, and most early pregnancy reactions disappear after 12 weeks of pregnancy. However, each person’s reaction in early pregnancy is very different. Some pregnant women have severe nausea and vomiting, cannot eat or drink, and become severely dehydrated and electrolyte disordered, or even have abnormal liver function and fever, and need to terminate pregnancy if necessary, while most pregnant women do not have such severe pregnancy reactions or have very mild reactions, and a few pregnant women do not have nausea and vomiting, and a very small number of pregnant women show easy hunger and increase the number of times and amount of food eaten. Whether the early pregnancy reaction is present or absent, it is normal. If the clinical examination of the fetus and the pregnant woman are in good condition, it is normal. However, the only way to know if the fetus is normal in early pregnancy is by ultrasound. Early pregnancy reaction usually starts at 6 weeks and disappears at 12 weeks. During this period, pay attention to multivitamin and trace elements supplementation and balanced diet. In case of severe early pregnancy reaction, it is necessary to fast from water to prevent food from stimulating gastric acid secretion and aggravating vomiting symptoms, and it is necessary to be hospitalized for symptomatic treatment, such as intravenous rehydration and antiemetic injection. Some pregnant women worry that if they don’t vomit or have no obvious early pregnancy reaction, it means that the fetus is not developing well, which is a wrong concept.