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A member asked:
Is conception more accurate based off lmp or 9 week ultrasound?
A doctor has provided 1 answer
Both is best: The most accurate dating is where the 1st trimester ultrasound is within a week of the LMP dating; that confirms the LMP dating. If the 9 week ultrasound gives dates greater than 1 week from what's predicted by the LMP then the LMP is not accurate and the ultrasound dating should be used.
Answered 2/13/2015
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Related Questions
A member asked:
Hi doctors i had a ultrasound yesterday it said due aug 29 what is more accurate LMP or ultrasound i need my most accurate conception date please help?
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A member asked:
Do ultrasounds date from conception or lmp? I.E. If they say baby measures 12 weeks, is that from conception or should that date back to your lmp?
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A member asked:
What is my dates of conception if LMP is Oct. 13 2014 and first ultrasound at 9 weeks gave me a due date of July 25 2014?
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A member asked:
Do ultrasounds add two preconception weeks when measuring baby? If baby measures 12 w is this supposed to date to LMP or conception?
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