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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?
A doctor has provided 1 answer
LMP: Dating is based on LMP as that is usually a measurable event.
Answered 2/13/2015
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Related Questions
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My ultrasounds date back to my (estimated) date of conception rather than the first day of my LMP. Is this normal?
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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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Based on an estimated LMP from an eight week ultrasound to be 10/15/12, what is the very latest possible date conception could have occurred?
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My LMP was 6/11/12. Ultrasound on 8/7/12 said ga was 7w5d, crl 1.44cm. What are possible dates of conception?
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People also searched for:
Do ultrasounds add two preconception weeks when measuring baby? If baby measures 12 w is this supposed to date to LMP or conception?
How accurate is an early ultrasound? On 6/15/18 baby measured 5w6d. Between what dates could conception of happened? LMP 5/5.
1st ultrasound says crl 8mm 6w5d. 2nd says crl 28mm, 9w4d. 3rd , crl 60.9mm 12w4d.Are these supposed to date back to lmp? When was conception?
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