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A member asked:

How accurate are ultrasounds in determining your conception date? how many days can it be off?

A doctor has provided 1 answer
Dr. Seth Derman answered

Specializes in Reproductive Endocrinology and Infertility

Depends when: Early ultrasounds (before 8 weeks) are accurate within about 3 days. As time goes by, ultrasound measurements become less useful in determining your due date, and likely conception date.

Dr Kobasa agreed

Answered 9/10/2015

4.4k views

Thank

Related Questions

A member asked:

Only possible conception dates: 7/4 and 7/18-23rd my first ultrasound dated me at 13 weeks 5 days.With a conception date of 7/20.How accurate is this?

A doctor has provided 1 answer

A member asked:

How accurate are ultrasounds? With conception date LMP 4/25/14 30 daycycle lasted 4 days DueDate 1/30/15 according to 8wk 4day ultrasound on 6/24/14

A doctor has provided 1 answer

A member asked:

How well is conception date accuracy with ultrasound at 12 weeks? My LMP started on nov.28, 2011 lasting five days. I had an ultrasound on jan.17, 2012 counting me at 7 weeks and 1 day, then another ultrasound on feb.21, 2012...Counting me at 12 weeks exa

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:

Which is more accurate at determining the date of conception? A 5 or 8 week ultrasound?

A doctor has provided 1 answer

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People also searched for:

If someone had early ultrasound at six weeks determined conception date to be december 6, 2012 is that date accurate and how many days can it be off?
According to my 8 and 12 week ultrasounds my conception date is january 5? How accurate is this and how many days can it be off ?
If my first Ultrasound said 7weeks and 4 days and my second said 10 weeks and 2 days would be date of conception be accurate? When I put it in a calculator it said 6/19/2021 Date of Conception?
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