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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

4.4k views

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Related Questions

A member asked:

My ultrasounds date back to my (estimated) date of conception rather than the first day of my LMP. Is this normal?

A doctor has provided 1 answer

A member asked:

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?

A doctor has provided 1 answer

A member asked:

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?

3 doctors weighed in across 2 answers

A member asked:

First ultrasound on 12/10/12 dated at 8 weeks and estimated my unknown LMP to be 10/15/12. Is it at all possible conception happened after 11/14/12?

A doctor has provided 1 answer

A member asked:

My LMP was 6/11/12. Ultrasound on 8/7/12 said ga was 7w5d, crl 1.44cm. What are possible dates of conception?

A doctor has provided 1 answer

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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?
Why does my ultrasound and lmp match to the exact date? Do ultrasound measure from conception?
If ultrasounds date from conception, then why did the sonographer tell me i was exactly as far along as my LMP says? Edds were the same as well.

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