Multi-walking due dates are not early and are fixed for each pregnant woman. It is medically prescribed to calculate the due date from the first day of the last menstrual period. The whole pregnancy period is 280 days in total, 10 gestational months, each gestational month is 28 days, i.e. 40 weeks. This method is suitable for pregnant women with a menstrual cycle of 25-35 days; if the menstrual cycle is 20 days, the above calculation date minus 10 is the due date; if the menstrual cycle is 45 days, the above calculation date plus 15 is the due date. If you are able to do so, you should check the expected date of delivery based on the ultrasound report of early pregnancy, especially if you cannot remember the date of your last menstruation or if you have no menstruation during breastfeeding, you should use ultrasound to help you estimate the expected date of delivery. If the time interval between the gestational week estimated from the last menstrual period and the gestational week estimated from the early ultrasound examination is more than 7 days, the due date should be corrected according to the results of the early ultrasound examination. Ultrasonography in early pregnancy to detect fetal head and rump length is the most accurate indicator to estimate the gestational week. Clinically, by combining parameters such as the time of early pregnancy reaction, the earliest appearance of fetal movement, uterine height and abdominal circumference, the expected date of delivery can be projected more accurately. Although more walking will not bring forward the due date, for pregnant women without cephalopelvic disproportion, more walking will help to mature the cervix and induce labor initiation due to the effect of gravity and pressure of the fetal head on the cervix.