Table 14. Maternal cardiac output models (flow rate in L/h vs. maternal mass in kg for power law models, flow rate in L/h 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	309.15	3.1963	—	—	-5195.06	10394.1
Quadratic	300.24	6.4348	-0.094905	—	-5178.48	10363.0
Cubic	301.78	3.2512	0.15947	-0.0047059	-5175.96	10359.9
Modified Gompertz	18.903	0.21568	0.11022	282.19	-5179.72	10367.4
Modified Logistic	167.03	0.12506	6.0723	247.93	-5179.64	10367.3
Power Law	0.81619	1.4473	—	—	-5200.06	10404.1
Luecke Power Law	0.081119	2.5485	-0.13127	—	-5199.52	10405.0

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.