Table 1. Fertility parameters.

Genotype	Number of Litters	Number of Pups	Time to First Litter (Days)
WT (n = 10)	1.40 ± 0.16	12.70 ± 0.74	20.50 ± 0.62
Obif −/− (n = 10)	0.90 ± 0.18	10.94 ± 1.33	25.25 ± 2.57

Male mice at 12 wks were placed with ICR fertile females at 10 wks for 28 days. Results are shown as mean ± SEM. All data were analyzed with the F-test to determine normality, and the appropriate t-test was applied at the level of 5%.