A concave belly button in late pregnancy indicates that the fetus is growing faster, causing a change in the circumference of the umbilicus, which is normal in most cases. In the mid-pregnancy when pregnant women’s belly button is usually raised, and in late pregnancy is the period of rapid growth of fetal weight, with the growth of the fetus, pregnant women’s abdominal shape will also change, will make the belly button concave situation, at this time it is generally normal, do not need special intervention. It is recommended that pregnant women pay attention to the growth of the fetus during late pregnancy and monitor the fetal heart regularly. In addition, you need to pay attention to the fetal movement and observe whether you have abnormal vaginal bleeding, abnormal fluid flow and so on. If there are abnormal symptoms, it is important to pay attention to timely medical treatment.