A woman's last menstrual period began on 11 December. By Naegele's rule, what is the expected date of delivery?

Answer and explanation

Correct answer: B. 18 September

  1. Step 1: Naegele's rule adds 7 days to the first day of the last period and subtracts 3 months.
  2. Step 2: 11 + 7 = 18, and the month moves to September, so the date is 18 September.
Answer
18 September.

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