In late pregnancy, weight control can be achieved through diet regulation, moderate exercise and treatment of comorbidities. 1. Regulate diet: During pregnancy, you need to increase dietary nutrients to meet the physiological needs of the mother and child, you can eat some protein-rich foods under the guidance of your doctor, such as fish, meat, eggs, etc., but also eat more fresh fruits and vegetables, and to control foods rich in sugar and fat to avoid gaining weight too quickly. 2. Moderate exercise: During pregnancy, you can insist on doing some moderate-intensity physical exercise, such as walking, yoga and so on, under the guidance of doctors to maintain appropriate weight gain, but should not do jumping, ball games and other sports. 3. Treatment of comorbidities: For pregnant women with gestational diabetes mellitus, it is easy to cause excessive and rapid weight gain, and they need to control blood sugar through reasonable diet and appropriate exercise under the guidance of doctors, and if necessary, they need to give insulin hypoglycemic treatment.