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Mathematical equations (a*Vfetb) fit to data describing fetal tissue volumes, where Vfet is the volume of fetus, for a, liver (a = 0.05, b = 0.99); b, fat (a = 0.01, b = 3.22); c, kidney (a = 0.01. b = 0.9); d, brain (a = 0.15, b = 0.77); and e, lung (a = 0.024, b = 0.752). Data were refit from Luecke et al. (1995).
