When back pain occurs in late pregnancy, the condition may be due to an impending birth. It may also be caused by a lack of calcium. This is because in late pregnancy, with the rapid development of the fetus, pregnant women are easily deficient in various nutrients as well as minerals, especially calcium, iron, vitamins and so on. Once deficient, it is easy to cause symptoms of lumbago. When lumbago is accompanied by leg cramps and sciatica, besides taking vitamin B12 and calcium supplements, you should also consult your doctor for professional help. For mild deficiency, dietary supplementation is recommended. In the later stages of pregnancy, as the fetus develops further and as the fetus gradually enters the pelvis, it can also lead to symptoms such as back pain. On the other hand, it is also important to note that some pregnant women have contractions that manifest as regular back pain. Therefore, in the second trimester, if you experience severe back pain, it may also be a symptom of labor. If the pain is unbearable, it is recommended to go to the hospital for a timely checkup.