In most women, the fetal head is gradually brought into the pelvis after 34 weeks of gestation, with some women starting to do so before delivery. The fetal pelvis is affected by a number of factors. If there is cephalopelvic disproportion, i.e. the fetal head is large, the umbilical cord is wrapped around the neck or the pelvic inlet is narrow, it may be difficult to enter the pelvis. In addition, the mother often remains in a seated position, which can also lead to late pelvic entry. Therefore, it is not possible to generalize the number of weeks for the fetus to enter the pelvis, and the time of pelvic entry varies from one pregnant woman to another. The timing of labor does not affect the time of labor, but the start of labor depends mainly on the appearance of regular contractions before labor. Usually, when the fetal head drops significantly in late pregnancy, the mother may have abdominal cramps and frequent urination, etc. It is recommended that pregnant women go to the obstetrics department for regular checkups. In addition, it is recommended that pregnant women walk around more, take more walks and maintain adequate nutrition after pelting, so that they can be ready for delivery at any time without being too nervous.