Crown-rump length is the total length of a fetus from the top of the head to their bottom. This length is used to calculate things like the estimated age of the pregnancy.
CRL is normally around 50-55 mm at 12 weeks.
Crown-rump length is very accurate when determining gestation age for the most part. There is about a 90% confidence level that the age is within three days of the given result.
According to medical sites, if the CRL is 84 mm or more, there is a chance the child has Down Syndrome.
According to medical sites, the optimal CRL is between 45 and 84 mm at the time of birth.
Create Date: October 2, 2024
Last Modified Date: October 2, 2024
