It is impossible to determine specifically whether back pain is a symptom of pre-term labor. Because in the later stage of pregnancy, 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 lumbago and back pain. When lumbago is accompanied by leg cramps and sciatica, besides taking vitamin B1 supplements, you should also consult your doctor for professional help. For those who are mildly deficient, 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 the appearance of symptoms such as back pain. On the other hand, it is also important to note that premature babies usually use back pain as a means of appearing to signal early entry into the pelvis. Therefore, in the second trimester, if you experience severe back pain and abdominal pain, it may also be a symptom of preterm labor. Therefore, if the pain is unbearable, it is recommended to go to the hospital for examination in time.