Pregnancy is usually delivered in 280 days, i.e., 40 weeks, and 4 weeks in a month, i.e., delivery in the tenth month of pregnancy. The whole process of pregnancy is about 280 days, generally from the first day of the last menstrual period, pregnancy in October that is to reach the expected date of delivery, clinically, in order to be more accurate, usually use the unit of weeks to record the length of pregnancy, that is, 40 weeks of pregnancy for the expected date of delivery. However, not all pregnant women give birth on the expected date, most pregnant women can give birth after 37 weeks of pregnancy, before 37 weeks is called preterm labor, between 37 and 42 weeks is called full-term labor, and after 42 weeks is called overdue labor. Therefore, if a pregnant woman reaches 37 to 42 weeks of pregnancy, she needs to be ready to give birth, once regular abdominal pain, redness, etc., it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examinations, and be ready to deliver the baby.