Fetal pelvic entry at 31 weeks of pregnancy is relatively early and is usually abnormal. The majority of pregnant women will experience fetal pelvic entry at 36 weeks, and pregnant women are advised to seek medical attention for timely observation. The fetal pelvis is a necessary process before natural delivery, because most first-time pregnant women deliver about 2 weeks after the fetus is in the pelvis, so the fetus is in the pelvis at 31 weeks is relatively early. The early pelvic entry is related to a number of factors such as the small head of the fetus and the large pelvic cavity of the mother. If the pelvic entry is only due to the small head of the fetus and the large pelvic cavity of the mother, then this pelvic entry is not really a pelvic entry, and the pregnant woman should not be overly nervous and pay attention to regular medical checkups. Of course, there are some risks associated with premature pelvic birth, such as increased chances of preterm labor and pain due to separation of the pubic symphysis, etc. Pregnant women should relax, follow the doctor’s instructions and pay more attention to their own condition to avoid preterm labor. Pregnant women with previous preterm labor should also pay attention to check the length of the cervical canal and the degree of dilatation of the inner cervical opening to detect or exclude the possibility of preterm labor as early as possible.