| Classification | Parity | Farrowing cycles |
|---|---|---|
| Mean±SD | Mean±SD | |
| Small farm | 4.39±0.78 | 2.22±0.15 |
| Large fram | 4.19±0.79 | 2.30±0.13 |
| Spring | 4.12±0.77 | 2.24±0.12 |
| Summer | 4.07±0.73 | 2.32±0.13 |
| Fall | 4.38±0.81 | 2.20±0.14 |
| Winter | 4.50±0.80 | 2.29±0.15 |
| Average | 4.27±0.79 | 2.26±0.14 |