Table 3.

Energetic efficiency of fetal growth as a function of tissue heat production (kcal/d)

Days pregnant	Energy accreted1	Heat production2	Efficiency, %
137	40	65	38
180	162	246	40
226	458	679	40
250	644	1,133	36

¹ Ferrell et al. (1976).

² Reynolds et al. (1986).