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A member asked:
How accurate are ultrasounds in determining your conception date? how many days can it be off?
A doctor has provided 1 answer
Depends when: Early ultrasounds (before 8 weeks) are accurate within about 3 days. As time goes by, ultrasound measurements become less useful in determining your due date, and likely conception date.
Answered 9/10/2015
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Related Questions
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Which is more accurate at determining the date of conception? A 5 or 8 week ultrasound?
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