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Fetal biometric parameters

Dr Abhilash Sandhyala and Radswiki et al.

Fetal biometric parameters are various antenatal ultrasound measurements that are used to indirectly assess the growth and well being of the fetus and well in assessing dates - gestational age

They include

Standard parameters

Assessed and reported on a routine 2^nd trimester scan

bipareital diameter (BPD)
head circumference (HC)
abdominal circumference (AC)
femoral length (FL)

Additional paramaters

humeral length (HL)
trans-cerebellar diameter (TCD)
occipito-frontal diamter (OFD)
inter ocular distance (IOD)
binocular distance (BOD)
ratios
- fetal cardio-thoracic circumference ratio
- fetal thoracic to abdominal circumference ratio
- fetal thoracic to head circumference ratio

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