From: WHO multicentre study for the development of growth standards from fetal life to childhood: the fetal component
Biometrical parameter
Sample size
Variance
Rho
d (mm)
Biparietal Diameter
32
10.2
0.34
0.1
Head circumference
23
174
0.28
0.5
Abdominal circumference
28
263
0.43
Femur length
16
5
0.32
Humerus length
35
11