It is normal to have no reaction in the first month of pregnancy, and the early pregnancy reaction usually appears at 6 weeks of pregnancy, while a few sensitive pregnant women appear at 4 weeks, and there are also a few pregnant women who do not have any uncomfortable reaction during the whole pregnancy. Because of the different physical conditions and hormone levels in each person, the early and late reactions and the degree of early pregnancy reactions are different. The common clinical reactions to early pregnancy are as follows: 1. Menopause: Generally, women who have sexual intercourse during their childbearing age and have menstruation for 1-2 weeks beyond their normal menstrual cycle will be considered pregnant first; 2. Nausea and vomiting: It mostly occurs in the morning and is the most common reaction to early pregnancy, which is related to the fluctuation of hormone levels in the body and can occur at any time, such as when brushing teeth or eating in the morning, and drinking water can also cause nausea and vomiting. If the vomiting is particularly serious, you need to go to the obstetrics department in time, and if necessary, you need to be hospitalized for rehydration. 3. Prefer sour food, such as grapes, prunes, etc.; 4. Lethargy and drowsiness: because of pregnancy vomiting, eating less and reducing nutritional intake, which may lead to low blood sugar of pregnant women and weakness and drowsiness.