The time of delivery for women who become pregnant in the fifth month of the lunar calendar will usually be at the end of February or the beginning of March of the next lunar year. The calculation of a woman’s due date is based on the last menstrual period, because the May lunar month itself has a larger range of the last menstrual period. For example, a woman’s due date is calculated 280 days after her last menstrual period. If it is the last menstrual period on May 1, the due date will be February 8 next year. Since the time of intercourse fluctuates and changes significantly, it is not accurate to calculate the due date based on the time of intercourse, and it is not clear which pregnancy is the result of multiple sexual intercourse. Therefore, it is relatively accurate to calculate the due date according to the time of the last menstruation, and you can also know your due date during pregnancy through the usual pregnancy test, the due date of women is at 40 weeks of pregnancy.