. Author manuscript; available in PMC: 2014 Jan 16.

Published in final edited form as: Int J Dev Biol. 2012;56(4):255–261. doi: 10.1387/ijdb.113407lk

TABLE 1.

EFFECTS OF AKT1, IGF2, AND GENETIC BACKGROUND ON POSTNATAL SURVIVAL

Genotype	Number of litters examined	Litter size^a	Percent viable litters^a	Sex ratio (male:female)^a
C57BL/6 +/+	10	6.8 ± 0.49	100	30:38
C57BL/6 Akt1−/−	11	4^b	9.1^c	2:2^b
CD1+/+	10	12.30 ± 1.07	100	63:60
CD1 Akt−/−	26	8.56 ± 0.52^d	88.5	105:91
CD1 Igf2−/−	6	6.83 ± 0.48^d	100	19:22

Determined on day 20 postpartum;

Based on data from the one litter with live pups on day 20 postpartum;

Significantly different from all other groups, P<0.005;

Significantly different from CD1+/+, P<0.005.