How is the due date for a pregnancy typically calculated?

Question

Quizplus · Accepted Answer

The due date for a pregnancy is typically calculated from the first day of the last menstrual period. This is because it is difficult to determine the exact date of ovulation and conception, but the first day of the last period is usually a more concrete and identifiable starting point for counting the length of the pregnancy. Doctors will often use ultrasound measurements and other methods to confirm the due date based on this calculation.

How Is the Due Date for a Pregnancy Typically Calculated