It is not possible to lose weight excessively during pregnancy, but it is necessary to control weight gain during pregnancy, which can generally be controlled by controlling diet, appropriate exercise and other methods. 1. Diet control: During pregnancy, you should develop good eating habits, eat more fresh fruits and vegetables, and avoid eating sweets such as candy, chocolate, milk tea and other high-calorie, high-fat sweets, etc. This can be a good control of body weight during pregnancy, and at the same time is conducive to the growth and development of the fetus. 2. Appropriate exercise: under normal circumstances, pregnant women appropriate exercise, such as outdoor slow walking, etc., can control weight gain, but also conducive to pregnant women to breathe fresh air, maintain a good mood, help the fetus good health of pregnant women. Note that during pregnancy can not be excessive weight loss, such as dietary restrictions, do strenuous exercise, etc., these are not conducive to the health of pregnant women and the fetus, if the pregnant woman during pregnancy weight gain levels significantly lower than the average, it is recommended that timely medical attention, under the guidance of the doctor, improve the relevant examination, clear causes, symptomatic treatment.