When the fetus is in the pelvis, most pregnant women usually do not have obvious feelings, a few pregnant women will feel tightness in the abdomen with a feeling of swelling, epigastric pressure to reduce the feeling of frequent urination, constipation and so on. 1. Abdominal tightness and distension: after the fetus enters the pelvis, the head of the fetus presses the pelvic floor, and the pregnant woman will feel a feeling of distension in the pelvic floor area. 2. Relief of upper abdominal pressure: after the fetus enters the pelvis, the fetal head enters the pelvic inlet, and the uterine fundus descends, the pregnant woman will feel relief of upper abdominal pressure, and she will feel that her breathing is smoother, and her appetite will increase. 3. Frequent urination, constipation aggravation: the fetus into the basin will increase the pressure on the bladder, rectum and other organs, so many pregnant mothers will appear frequent urination, constipation. Fetal biparietal diameter gradually into the pelvic inlet plane, known as the pelvic. Some pregnant women will have some sensations after entering the pelvis, and some will not have any special sensations. However, through the doctor’s abdominal palpation and vaginal examination, you can also determine whether the fetus has entered the pelvis.