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A member asked:
How accurate are 8 week ultrasounds in determining the time of conception?
5 doctors weighed in across 3 answers
Fairly accurate: 8 week vaginal ultrasounds are fairly accurate but only to the nearest 7 days. It is fair but not certain as to the exact date of ovulation.
Answered 1/14/2016
5k views
Very good: Ultrasounds even done this early are very good at estimating the date of conception.
Answered 6/30/2013
5k views
Very accurate if ...: Done by trained, competent ultrasound technologist or radiologist/ob/gyn physician. The most accurate measurement for dating is the crown-rump length at between 7 and 13 weeks gestation. Accuracy is +/- 8%, or approximately +/- 4 days at 8 weeks gestation.
Answered 10/16/2017
5k views
Related Questions
A member asked:
When are prenatal ultrasounds most accurate for estimating conception? 6 weeks or 10 weeks or 19 weeks?
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Are ultrasounds accurate at dating conception at 12 weeks?
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A member asked:
How accurate is an ultrasound at 15 weeks determining possible conception date , due date is nov 19?
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A member asked:
If my 8 and 12 week ultrasound gave me a due date of September 28th how accurate is the conception date and how far can it be off ?
A doctor has provided 1 answer
A member asked:
I am 8 weeks 5 days according to an ultrasound I have had done. Since I have had an ultrasound can I get an accurate conception date?
7 doctors weighed in across 2 answers
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