Difficulty: Medium
Average Score: 92%
Full-length
A female client presents to the obstetric-gynecology clinic for a pregnancy test, the result which turns out to be positive. Her last menstrual period began December 10, 1993. Using Nägele's rule, the nurse estimates her date of delivery to be:
Correct answer
A
Rationale
According to Nägele's rule, the estimated date of delivery is calculated by adding 7 days to the date of the first day of the normal menstrual period (December 10 + 7 days = December 17), and then by counting back 3 months (December 17 - 3 mo = September 17). (B, C, D) These answers are incorrect.