Question 1 · Hard
A woman with a regular 35-day cycle had her LMP on 1 April. Her corrected EDD, adjusting Naegele's rule for cycle length, is:
- A8 January
- B22 January
- C15 January
- D1 January
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Answer: C · 15 January
Naegele's rule gives 8 January for a 28-day cycle. Ovulation comes later in a longer cycle, so the extra days beyond 28 are added: 35 - 28 = 7 days. The corrected EDD is 15 January. For a cycle shorter than 28 days the difference is subtracted.
- A: 8 January is the uncorrected date for a 28-day cycle.
- B: 22 January adds the correction twice.
- D: 1 January adds no days at all after 9 months.