Belly changes at 4 months of pregnancy: At 4 months of pregnancy, the fetus has developed and formed, the placenta and amniotic fluid have formed, and the pregnant mother may begin to feel some physical changes, the most significant of which is the changes in the belly. The following will expand in detail from four aspects. 1. The belly gradually bulges. In the early stages of pregnancy, the fetus is very small and the uterus is not big enough, so the belly will not change significantly, and the pregnant mother\’s body shape will hardly change. Follow