1. Physical changes in 5 months of pregnancy At 5 months of pregnancy, the fetus has begun to grow into a small human shape, and the body gradually becomes more obvious. The mother\’s vagina will also gradually expand as the fetus grows. At this time, the mother may feel that her abdomen becomes more bulging, and some other physical changes may occur, such as breast enlargement, heartburn, etc. 2. Things you need to pay attention to when you are 5 months pregnant