Most women experience an enlarged belly when they are about four months pregnant, and can be physically seen as pregnant in their clothes. Due to individual differences, fatness and thinness, some people will be able to tell that they are pregnant relatively early in the pregnancy period, while others will be relatively late. As the month of pregnancy increases, the uterus enlarges and the fetus grows, the pregnant woman’s belly will get bigger and bigger, and generally after the full-term pregnancy, the fundus of the uterus is about two fingers below the saber is a normal phenomenon. In addition, if you have a twin pregnancy, you can see the enlargement of your belly in the third trimester.