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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?

A doctor has provided 1 answer

Yes. LMP.: The gestational age (number of weeks pregnant) stated in the result of the ultrasound already added the 2 preconception weeks. If the ultrasound dating says 12 weeks gestation, that means 12 weeks since the estimated start of the last menstrual period (lmp).

Answered 3/2/2014

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Related Questions

A member asked:

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?

A doctor has provided 1 answer

A member asked:

Do ultrasounds add two weeks & should they theoretically date back to your lmp?On 12/6/13 baby measured 12w4d, crl was 60.9mm.If go back 12w4d should that date to(or close to) my lmp?When was conceptn?

3 doctors weighed in across 2 answers

A member asked:

If i havent had periods for two years due to Depo-Provera how can they date me off LMP i had first ultrasound at 14w how old will bby measure then?

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

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People also searched for:

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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