How long does it usually take for the head to enter the pelvis in late pregnancy is mainly related to the individual’s constitution and cannot be generalized. It is not possible to calculate the time of delivery based on the time of fetal head entry, as each person’s constitution is different, and therefore each pregnant woman has a different time of fetal head entry. In most cases, the fetal head will be in the pelvis at 36 weeks if it is the first child; if it is a transitional mother, the fetal head will be in the pelvis at the time of delivery, so it is not possible to calculate the time of birth by this method, but pregnant women can calculate the time of birth by ultrasound, combined with clinical symptoms. In general, if the placenta is mature, regular uterine contractions or redness and water breakage occur around 38 weeks of pregnancy, it often indicates that the baby is about to be born. In addition, women in late pregnancy must pay attention to rest, after the baby into the pelvis can be appropriate exercise, to maintain a good mood. They also need to pay attention to a balanced diet and go to the hospital regularly to check the condition of the fetus and be ready for a normal delivery.