Question 1

What is Naegele's rule?

Accepted Answer

Naegele's rule is a standard method for estimating the due date by adding 280 days (40 weeks) to the first day of the last menstrual period. It assumes a 28-day cycle with ovulation on day 14.

Question 2

Why is the due date only an estimate?

Accepted Answer

Due dates are estimates because the exact date of conception and the length of pregnancy can vary. Only about 5% of babies are born on their estimated due date. Many factors, including cycle regularity and ovulation timing, can affect the actual date.

Question 3

How is gestational age calculated?

Accepted Answer

Gestational age is calculated as the number of days between the first day of the last menstrual period (LMP) and today's date, expressed in weeks and days. It is a measure of how far along the pregnancy is.

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