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A 46-year-old member asked:

how to find out conception date from crown rump length ultrasound gestational age?

2 doctor answers2 doctors weighed in
Dr. Grant Linnell
Radiology 24 years experience
Equation: Typically, the crown rump length is used to calculate gestation age and edc or estimated date of confinement(the delivery date). This can be used, however, in reverse, to estimate the date of conception.
Dr. William Jenkins
Specializes in Anesthesiology
To go: from gestational age to conception you would subtract two weeks but not always accurate

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Last updated Dec 11, 2016
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