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Incidence of milk fever according to milk yield in Holstein cows.
| Total of milk production per 305-day lactation (L) | Total number of parturitions | Number of milk fever cases | Incidence of milk fever (%) |
|---|---|---|---|
| < 6324 | 62 | 1 | 1.61 |
| 6324–7542 | 219 | 3 | 1.37 |
| 7543–9149 | 305 | 8 | 2.62 |
| > 9149 | 286 | 30 | 10.49 |
| Overall | 872 | 42 | 4.82 |
