Table 1 Characteristics of the investigated herds.
Variable | Herds | ||
|---|---|---|---|
1 | 2 | 3 | |
Number of milking cows, head | 4800 | 2500 | 3000 |
Average incidence of dystocia, % | 12.0 | 22.5 | 14.5 |
Average incidence of stillbirth, % | 4.29 | 8.23 | 2.16 |
Average incidence of twinning, % | 2.50 | 5.50 | 3.80 |
Average gestation length, d | 276 | 276 | 276 |
Average dry length, d | 67 | 63 | 62 |
Average body condition score at calving | 3.21 | 3.40 | 3.24 |
Calf birth weight, kg | 41.90 | 40.72 | 40.23 |
Average milk yield, kg | 42.00 | 41.80 | 41.90 |
