It is not possible to determine specifically if back pain is a sign of labor. Because in the second trimester, with the rapid development of the fetus, pregnant women are easily deficient in various nutrients and minerals, especially calcium, vitamins and iron. Once deficient, it is easy to cause back pain and lumbago. When lumbago is accompanied by leg cramps and sciatica, besides taking vitamin B12 and calcium supplements, it is also necessary to consult a doctor for professional help. For mild deficiency, dietary supplementation is recommended. In the later stages of pregnancy, with the further development of the fetus and the gradual entry of the fetus into the pelvis, it can also lead to symptoms such as back pain. On the other hand, it should also be noted that some pregnant women have regular contractions that are not regular lower abdominal pain but regular low back pain. Therefore, in the second trimester of pregnancy, if there are severe symptoms such as back pain and lumbago, it may also be a symptom of labor. Therefore, if the pain is unbearable, it is recommended to go to the hospital for examination in time.