How many weeks do pregnant women usually give birth?

Patient's question:

No

Doctor's answer:

Hello, calculate the due date starting from the first day of the last menstrual period. The entire pregnancy lasts for 280 days, which is equivalent to 10 gestational months. Add 9 or subtract 3 from the month of the last menstrual period date to get the due date month number; add 7 to the day to get the due date day. The due date does not necessarily mean that delivery will occur on that day—it is just an approximate time. Delivering within two weeks before or after the due date is considered within the normal range.