How long does a normal pregnancy last, counted from the first day of the last menstrual period?
Answer and explanation
Correct answer: B. About 40 weeks
- Step 1: A full-term pregnancy lasts about 280 days, which is 40 weeks.
- Step 2: This is the basis of dating.
Answer
About 40 weeks.
Why not the others: The other durations are too short or too long.
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