Table 1. The correlation between the number of pups born after mating female deer mice with male deer mice and oocytes isolated after superovulating female deer mice.

No. of mated female micea	No. of pups in total (Mean ± SD)	No. of superovulated female miceb	No. of isolated oocytes in total (mean ± SD)
5	21 (4.2 ± 0.4)	3	13 (4.3 ± 0.5)

^aFemale mice were mated with male mice and the number of pups was checked after birth.

^bPMSG (5IU) was injected into female mice and hCG at the same dose was applied 56 h later. Oocytes were isolated from the oviduct 15 h after hCG administration.