Table 1.

Fetal and placental weights and fetal:placental weight (F:P) ratio in WT and Igf2 P0 promoter (P0) knockout mice at E17 and E19

	E17		E19
	WT	P0	WT	P0
Fetal weight (g)	0.60 ± 0.01	0.54 ± 0.01*	1.20 ± 0.02	0.93 ± 0.02*
Placental weight (g)	0.095 ± 0.001	0.066 ± 0.001*	0.094 ± 0.003	0.062 ± 0.002*
F:P ratio	6.4 ± 0.1	8.2 ± 0.2*	13.0 ± 0.4	15.2 ± 0.5*

Data are expressed as mean ± SEM of the average placental and fetal weights of WT and P0 fetuses from within an individual litter, where n = 15 and 16 litters at E17 and E19, respectively.

*P < 0.001 vs. WT at same gestational age (paired t test).