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A member asked:

Can a 12 week fetus (62mm) be mistaken for a 10 week fetus? or is this outside range of error?

A doctor has provided 1 answer
Dr. Stephen Pappachen answered

Specializes in Obstetrics and Gynecology

Sure: All tests have ranges of error based on scales used, who's doing it (operator), equipment, etc...

Answered 3/16/2013

5.2k views

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People also searched for:

Doctor said that a 12 week fetus couldn't be 2 weeks off and confused with an 8 or 10 week fetus.Is there not a range of error with ultrasounds?
If you have a 12 wk u/s and it reads 12 wks+4days, and if there is an 11 day range of error, wouldn't there be a different measurement of the fetus?
If ultrasounds have margin of error, how do u know when you're within the range of when the NT scan should be done?Does fetus have to be certain size?
What is the error of margin for an ultrasound dating at 11 week 4 day, measuring the fetus crl at 4.8 cm?
GA is 8 weeks 4days when ultrasound was done. Ultrasound shows GA as 7 weeks 6 days. Fetus is 1.47cm. FHR 158bpm. Is this normal range? I'm 40.

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