Table 5 Prediction equations for body weight (in g) from measured variables (in mm) using data from four strains

From crown-rump length (CRL):

BW = -0.778+ 0.0966(CRL)

R² = 0.906

From biparietal diameter (BPD):

BW = 12.21 - 7.96(BPD) + 1.67(BPD)² - 0.110(BPD)³

R² = 0.844

From abdominal circumference (AC):

BW = -0.08 - 0.018(AC) + 0.00247(AC)²

R² = 0.879

From crown-rump length (CRL) and abdominal circumference (AC):

BW = -0.858 + 0.0659(CRL) + 0.0257(AC)

R² = 0.918