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A member asked:

My sonogram says 6 weeks, 3 days, on july 19, 2012, it dated conception to june 18, or 19, i think i got pregnant june 9 or 10. is this possible?

A doctor has provided 1 answer
Dr. Gerard Honore answered

Specializes in Fertility Medicine

Doubt it: It's always tricky working backwards, but a 1st trimester ultrasound (if done correctly) should be accurate to within one week, or +/- 3-4 days. I personally believe they are accurate to within a day or two. The conflict in dates you give is almost 10 days, that's hard to explain unless the sono is poor quality.

Dr Sparacino agreed

Answered 7/19/2013

5.6k views

Thank

Related Questions

A member asked:

If my due date is November 17 2021, what would be my conception dates. Will this be based on estimates? Assuming I'm on 28 day cycle which I don't have. April 15th ultrasound said I was 9 weeks 3 days pregnant?

A doctor has provided 1 answer

A member asked:

Is it very likely that early ultrasound at 8 weeks, 2 days could have been off on the dating of the pregnancy (conception) by 3 weeks or more?

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A member asked:

After conception 7 - 10 days, can do ultrasound ? Weather if i'm pregnant or not? Is it possible early pregnancy ?

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A member asked:

How accurate is an ultrasound done at 13 weeks, for dating a pregnancy? If exact conception dates are known can 13wks actually be 15wks 6 days!

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A member asked:

Through transvaginal ultrasound on 9/11/13 was told 6wks 4days pregnant. What are the possible conception days?

6 doctors weighed in across 2 answers

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