During pregnancy, symptoms of lower back pain may be caused by a lack of calcium or may be a precursor to miscarriage. During pregnancy, as the baby grows and develops, more calcium is needed. The mother must consume a large amount of calcium in order to meet the needs of the baby’s normal growth. If the intake of calcium is insufficient, the mother will experience back pain. Of course, there may also be other factors that cause fetal movement, which may lead to miscarriage. Generally speaking, if it is too strenuous exercise, it will lead to miscarriage. It is recommended that you must pay attention to the fact that if it is caused by a lack of calcium, you must take timely calcium supplements, you can eat more calcium-containing foods, and if necessary, you can also take calcium tablets to supplement calcium. If there is a possibility of miscarriage, it is recommended to go to the hospital in time to receive examination and treatment to avoid miscarriage.