1. Dietary Precautions Mothers who are 31 weeks pregnant need to pay attention to their diet and combine nutrition appropriately. It is recommended to eat more fresh vegetables and fruits and increase the intake of dietary fiber to help prevent constipation. At the same time, avoid excessive intake of greasy, spicy, irritating foods, as well as drinks containing irritating substances such as tobacco and tobacco. 2. Exercise Appropriate exercise during pregnancy can promote blood circulation, enhance and relieve mood. However, strenuous exercise and prolonged standing or sitting should be avoided after 31 weeks of pregnancy. It is recommended to choose light exercise, such as walking, yoga