There are many reasons why the belly does not show in the 5th month of pregnancy, because the physical condition of each person is different, some women are thin, it is not easy to show the belly, some women originally have a lot of fat accumulation in the small abdomen, this situation is easier to show the belly. Some women have deep pelvic cavity, so it is not easy to show belly, while some women have shallow pelvic cavity, this situation is easy to show belly, so as long as the ultrasound dynamic observation of fetal development within the normal range, do not worry during pregnancy to go to the hospital on time for maternity checks, if the results of the maternity check shows that the fetal development is normal, then you can not be too alarmed, quietly wait, a little longer time The belly will show up.