Percentage of females that became pregnant after mating with WT (white bar), Spatc1l+/- (gray bar), and Spatc1l-/- (black bar) male mice. Male mice used: WT, n = 5; Spatc1l+/-, n = 6; Spatc1l-/-, n = 7. WT female mice used for mating with the indicated genotype: WT, n = 30; Spatc1l+/-, n = 36; Spatc1l-/-, n = 42. Vaginal plugs were observed in all mated females. 