Tailbone pain is indicative of possible pelvic insertion, but in the vast majority of pregnant women the main manifestation of fetal head insertion in late pregnancy is a reduction in the pressure on the stomach, a feeling of fetal descent as well as a significant increase in appetite. The pressure on the stomach leading to loss of appetite and decreased food intake will be greatly reduced. Individual women may also experience lumbosacral pain, lumbosacral pain in most cases depends on whether the pain is intermittent or persistent, especially in the tailbone pain at the same time whether it is accompanied by uterine contractions; uterine contractions from the abdomen can feel the uterus as a ball-shaped hardening sensation. And localized hardness is divided into stages, showing stages of good and bad, sometimes loose and sometimes tight, the vast majority of the tips will have late pregnancy irregular contractions, suggesting that there may be a precursor to the start of labor.