| Strain | 性別 | 3 週 | 4 週 | 5 週 | 6 週 |
|---|---|---|---|---|---|
| ICR | ♂ | 17.6±2.3 | 23.0±1.6 | 29.4±0.9 | |
| ♀ | 16.9±1.3 | 19.7±2.3 | 25.0±1.7 | ||
| BALB/C | ♂ | 11.1±0.9 | 17.3±0.9 | 20.7±0.8 | 19.9±1.2 |
| ♀ | 12.3±1.9 | 15.6±1.8 | 17.8±0.7 | 18.2±1.0 | |
| C57BL/6 | ♂ | 9.5±0.3 | 12.9±0.9 | 16.6±1.0 | 17.8±0.8 |
| ♀ | 9.1±0.8 | 12.0±1.2 | 14.3±0.6 | 14.9±0.8 | |
| C3H/HeN | ♂ | 11.2±0.9 | 17.5±1.7 | 18.8±0.8 | 20.6±0.5 |
| ♀ | 10.8±0.7 | 13.6±1.5 | 16.9±1.0 | 18.7±0.7 |