Table 13. Volumes of (some) maternal compartments that do not change during pregnancy.

Compartment	Symbol	Value (L)
Brain	$V_{\text{bran}}^{\text{m}}$	1.2749
Thyroid	$V_{\text{thyr}}^{\text{m}}$	0.016469
Kidneys	$V_{\text{kidn}}^{\text{m}}$	0.26653
Gut	$V_{\text{gutx}}^{\text{m}}$	1.1110
Liver	$V_{\text{livr}}^{\text{m}}$	1.3559
Lungs	$V_{\text{lung}}^{\text{m}}$	0.91945