The reason why the cervical canal is still very long even though the fetus has entered the pelvis is because it has not yet entered the labor process, and it is only after entering the labor process that the cervical canal will slowly shorten and soften. There is no direct relationship between the fetus entering the pelvis and the length of the cervical canal. In the second trimester, the fetus will enter the pelvis as it descends, but most pregnant women at this stage do not have regular contractions, so the cervical canal is not easy to become shorter. If the fetus has entered the pelvis after 37 weeks of full-term, in the absence of abnormalities in the pregnancy test, you can properly carry out a moderate amount of exercise, such as walking and other activities, which will help to promote contractions so that the cervical canal slowly soften and shorten, thus speeding up the process of labor is conducive to a smooth delivery. During pregnancy, we should pay attention to regular pregnancy checkups, especially in the second trimester, mainly pay attention to monitoring fetal movement and fetal heart, to avoid the state of fetal hypoxia, if there is regular contractions or redness and water breakage and other conditions need to be timely consultation and examination.