True statement regarding this fetal parameter is?

A. Best parameter for dating pregnancy

B. Can be measured till 10 weeks only

C. Accuracy for gestational age estimation is (+-) 7 to 10 days

D. Fetus is measured from head to toe

Correct Answer: Best parameter for dating pregnancy

Description: Ans. A. Best parameter for dating pregnancyCRL - Crown Rump lengtha. 1st trimester CRL is the best parameter for dating pregnancy. If carefully performed it has a variance of 3 - 5 days.b. Ideal time to perform CRL is between 7 to 10 weeks but can be done up till 14 weeks (till the embryo is 85mm long)c. The fetus is measured in the mid-sagittal plane from crown to the rump.

Category: Gynaecology & Obstetrics

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