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The mean SPL of the offspring
| 28-days-old | 70-days-old | |||
|---|---|---|---|---|
| No. | Mean SPL | No. | Mean SPL | |
| Experimental group | 16 | 36.56 ± 9.441,3,4 | 17 | 40.29 ± 9.61, 3 |
| Operation control group | 20 | 19.75 ± 3.82,4 | 20 | 22.25 ± 4.132 |
| Blank control group | 20 | 19.25 ± 3.734 | 20 | 21.25 ± 3.93 |
1p < 0.01, experimental group versus operation control group
2p > 0.05, operation control group versus blank control group
3p < 0.01, experimental group versus blank control group
4p > 0.05, 28-days-old versus 70-days-old
