Table 5. Efficiency of fetus production of oocytes from various ages of C57BL/6J mice.
| Age (week) | Treatment | Estimate no. fetus obtained from 100 ovulated oocytes | Estimate no. fetus obtained from individual animals |
|---|---|---|---|
| 3 | Fresh | 43.1 | 12.9 |
| Frozen-thawed | 13.6 | 4.0 | |
| 4 | Fresh | 53.6 | 16.6 |
| Frozen-thawed | 37.4 | 11.6 | |
| 5 | Fresh | 47.5 | 10.4 |
| Frozen-thawed | 33.5 | 7.3 | |
| 6 | Fresh | 53.0 | 10.6 |
| Frozen-thawed | 33.8 | 6.8 | |
| 8 | Fresh | 51.6 | 10.9 |
| Frozen-thawed | 30.0 | 6.3 | |
| 10 | Fresh | 62.9 | 15.1 |
| Frozen-thawed | 45.6 | 11.0 | |
Estimates were calculated from the results of Experiments 1 and 2 for fresh embryos, Experiment 3 for frozen-thawed embryos.