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A member asked:
What is edd (lmp) and edd (aua)? and which is more accurate when done in the first trimester; 7-8weeks?
A doctor has provided 1 answer
Estimated due date: The estimated due date can be calculated based on lmp or ultrasound. The due date based on ultrasound performed in the first trimester is usually accurate within 3to 5 days and is better than lmp. If the difference in the due date is more that one week, select the first trimester based ultrasound estimate. Good luck.
Answered 11/30/2017
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