Best marker of gestational age in 2nd trimester is :
Correct Answer: Biparietal diameter
Description: In the second trimester the BPD most accurately reflects the gestational age, with a variant of 7-10 days. Prediction of gestational age by USG: 8-12 weeks - Crown rump length measurement Second trimester -BPD, HC Third trimester - Femur length Ref: Williams Obs 24e pg 198.
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Anatomy
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