For women, generally after eating a large amount of food or pregnancy stomach will gradually get bigger, but due to individual differences can not be sure exactly how big it can be. If a girl overeats only once, the size of her belly will not change particularly; but if she overeats for a long time, the volume of her stomach will increase, which in turn will lead to the gradual enlargement of her belly and the gradual increase of fat, and can even reach the level of pregnancy. For pregnant women, with the gradual growth of the fetus in the uterus, the stomach will also gradually increase in size. Around 40 weeks of pregnancy, the abdominal circumference is mostly around 100cm, and the specific size cannot be determined due to the differences in the size of the fetus, the amount of amniotic fluid, and the size of the pregnant woman’s body. If women do not have overeating, pregnancy and other factors affecting the gradual increase in abdominal size, we should be alert to the occurrence of abnormal masses, ascites, intestinal obstruction and other diseases, if necessary, need to go to the regular hospital as soon as possible, clear the cause of the cause of the disease under the guidance of the doctor and active treatment.