The third trimester of pregnancy feels the stomach instead of small may have some relationship with early pregnancy reaction, but should also be alert to the abnormal development of the fetus, should be as early as possible to consult a doctor for examination. In the early stages of pregnancy, some pregnant women feel that their stomachs are smaller in the third trimester of pregnancy, which may be related to the early pregnancy reaction. Common early pregnancy reactions include nausea and vomiting, loss of appetite, etc. If the pregnant woman’s early pregnancy reaction is serious, it may be due to reduced intake and consumption of body fat, resulting in less abdominal fat, wasting, etc. In addition to the above symptoms, some pregnant women feel that their stomachs are smaller in the third trimester of pregnancy. In addition to the above symptoms, some pregnant women need to be alert to the abnormal development of the fetus, often accompanied by vaginal bleeding, abdominal pain and other symptoms of discomfort. Therefore, those who feel that their stomachs have become smaller in the third trimester of pregnancy should consult a doctor as soon as possible to find out if there are any abnormalities in the development of the fetus, so that the abnormalities can be dealt with as soon as possible. It is recommended that women pay attention to diet and rest during pregnancy, and that they should also attend obstetric checkups on a regular basis in order to monitor the growth and development of the fetus.