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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
Dr. John Storment answered

Gestational age: 12w4d means time from lmp. Conception was presumably at 10w4d ago.

Answered 10/26/2016

4.4k views

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Related Questions

A member asked:

I got my first ultrasound at 16 weeks. My LMP came to december 5th and conception date was december 19th. Is it possible i could of conceived jan 10?

A doctor has provided 1 answer

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

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:

LMP was Feb 18, I have shorter cycles of 25/26 days. 3 first trimester ultrasounds gave me a due date of Nov 19-21 putting conception at Feb 27-29. How accurate are these conception dates? Anyway conception occurred before February 20?

A doctor has provided 1 answer

A member asked:

I'm due aug 30th according to ultrasound at 12 weeks, 1st ultrasound at 6 weeks said due date aug 29th, my LMP nov 18 need my conception date range :)?

4 doctors weighed in across 2 answers

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