When a pregnant woman has no appetite in the third trimester of pregnancy, she can eat small meals and eat easy-to-digest, appetizing and light food, or eat some sweet and sour food according to her personal taste, which will help her appetite improve. If the lack of appetite seriously affects the health of the pregnant woman and the development of the fetus, you need to take antiplatelet tablets or intravenous nutritional solution under the guidance of the doctor. The lack of appetite in the third trimester of pregnancy is mainly caused by the increase of human chorionic gonadotropin in the pregnant woman’s body. During pregnancy, especially early pregnancy, most pregnant women will have early pregnancy reactions, such as no appetite, nausea, regurgitation, vomiting, fatigue and other pregnancy reactions, are normal phenomena, with the increase of time, pregnancy reactions will slowly disappear. Pregnant women should pay close attention to their health and take folic acid under the guidance of a doctor. Folic acid can prevent fetal neural tube defects as well as congenital heart disease, but also supplement vitamin B12, promote the production of blood during pregnancy, for the relief of physiological anemia during pregnancy is very helpful. At the same time, pregnant women need to eat a moderate amount of fresh fruits and vegetables, as well as eggs, milk, vitamins and proteins, try not to eat greasy, spicy, stimulating food, to achieve a reasonable diet, balanced nutrition, small meals, appropriate sports and exercise.