Pregnancy usually takes about forty weeks from the last menstrual period to the birth of the child. The number of days of pregnancy is counted from the first day of the last menstrual period, and the due date is forty weeks of pregnancy. It is not always the case that you will give birth on your due date. It is possible that you will give birth before or after your due date, and it is normal to give birth two weeks before or after your due date. It takes about thirty-six weeks from the formation of the fertilized egg to the maturity of the fetus, and after thirty-seven weeks of pregnancy, the fetus is mature and may give birth at any time. In late pregnancy, you should pay attention to observe whether there are symptoms of labor, if there is regular abdominal pain, redness, amniotic fluid flow, etc., it is about to give birth, and you should go to the hospital for regular maternity checkups during pregnancy.