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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.

Dr Rhoads and 3 doctors agreed

Answered 11/30/2017

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Related Questions

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I'm freaking out now! my first trimester due date was 6/23/13 now i'm in second trimester and it changed to 6/20/13, which one is more accurate?

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If LMP and first trim scans all point to same EDD, is the conception date range accurate?

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My first ultrasound was in my late 2nd trimester. How accurate is due date?

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What changes a due date? And why is the first trimester ultrasound more accurate than the second trimester ultrasound?

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Don't need to pinpoint conception day, but two first trim ultrasound give same due date we have no lmp to go off, how accurate is age of our baby?

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