Figure 4.

The utility of SOR for oocyte collection and embryo production with an inbred strain is shown. Group numbers correspond to those in Figure 3 B. Oocytes were collected from BALB/cByJ mice by using SOR for the first collection and then after euthanasia for the second collection (group 1). Control oocytes were collected after euthanasia from mice that had been superovulated once (group 2) or twice (group 3). L, left ovary; R, right ovary. Bars represent mean ± SEM; differences between groups were not significant.