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A member asked:
Hi doctor how old is 2.55 mm crl in weeks and days?
A doctor has provided 1 answer
Less than 5 weeks: The formula that converts crown rump length into gestational age has been validated between 6 and 13 weeks gestational age, and starts at a crown rump length of 5 mm. So, the measurement of 2.55 mm is too small to use the formula, but would have a gestational age less than 5 weeks.
Answered 7/27/2013
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