Table 19. Fetal liver mass models (g vs. fetal mass in g for power law models, g vs. gestational age in weeks for all other models).

Model	${\widehat{\mathit{\theta }}}_0$	${\widehat{\mathit{\theta }}}_1$	${\widehat{\mathit{\theta }}}_2$	${\widehat{\mathit{\theta }}}_3$	$\mathcal{l}\left(\widehat{\mathit{\theta }}\right)$	AIC
Linear Growth	1.0599	—	—	—	-12411.80	24825.6
Quadratic Growth	-1.4130	0.11397	—	—	-8241.18	16486.4
Cubic Growth	-0.69862	0.046670	0.0013891	—	-8198.03	16402.1
Gompertz	0.0074774	0.65856	0.061662	—	-8212.32	16430.6
Logistic	161.85	0.18771	32.712	—	-8275.32	16556.6
Power Law	0.10885	0.86562	—	—	-8231.05	16466.1
Luecke Power Law	0.38023	0.48526	0.028240	—	-8221.42	16448.8

For each model considered, the maximum likelihood parameter estimates ($\widehat{\theta }$), log-likelihood ($\mathcal{l}\left(\widehat{\theta }\right)$), and AIC are provided. The row describing the selected model is shown in boldface.