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A member asked:
Can an ultrasound due date be off by 1 week 4 days?
A doctor has provided 1 answer
Due date estimation: The estimation of due date can be based on lmp or ultrasound. If the ultrasound due date was performed in the first trimester and the difference is more than 5days from lmp based due date, the most accurate should be due date based on ultrasound. in your case, it is 11days and therefore should use ultrasound due date if done in first trimester. Good luck.
Answered 9/15/2017
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