The timing of fetal pelvic entry after pregnancy cannot be generalized; most pregnant women enter the pelvis at 37 to 38 weeks, or as early as 33 to 34 weeks, and some do not even enter the pelvis until delivery. Around 37 to 38 weeks of pregnancy, most primiparous women will show signs of pelvic induction. The biparietal diameter of the fetus’s head reaches the entrance level of the pelvis; this is fetal pelvic entry, which is usually a prelude to labor. Because of individual differences, the time of pelvic induction can be early or late. Some pregnant women may experience pelvic induction as early as 33 to 34 weeks, while others still have not had the head of the fetus inducted into the pelvis until the time of labor. When the fetus is in the pelvis, the mother may exhibit a rumbling and descending stomach and experience back pain and leg pain. However, not all cases of fetal head induction mean that labor will take place. It is also normal to see fetal head induction around 33 weeks. As long as the position of the fetus is normal, it does not matter when it is in labor. If the head of the fetus has not entered the pelvis by the end of the pregnancy, and the head of the fetus appears to be floating, it is necessary to decide the mode of delivery according to the specific situation under the guidance of the doctor.