Research Article
Repeat Breeding and Its’ Associated Risk Factors in Crossbred Dairy Cattle in Northern Central Highlands of Ethiopia
Table 4
Incidence of repeat breeding with risk factors (age, parity, BCS, milk yield, breeding methods, hygiene, and feeding management in crossbred cow/heifers.
| | Risk factors | Longitudinal study | | Group | Cow/heifers studied (no) | Incidence no. (%) | X2 (-value) | Odds ratio (95% CI) | -value |
| | Age (years) | <4 | 75 | 15 (20.0) | 29.6 (<0.01) | References | <0.01 | | 5-6 | 56 | 17 (30.4) | 1.7 (0.78–3.89) | | >7 | 118 | 68 (57.6) | 7.6 (3.43–16.75) |
| | Parity | <2 parity | 100 | 21 (21.1) | 32.8 (<0.01) | References | <0.05 | | 3–4 parity | 46 | 18 (39.1) | 2.4 (1.13–5.19) | | >5 | 40 | 29 (72.5) | 9.9 (4.26–23.08) |
| | BCS | Poor | 44 | 33 (75.0) | 37.0 (<0.01) | 9.7 (4.39–22.18) | <0.01 | | Medium | 99 | 23 (23.2) | Reference | | Good | 43 | 12 (27.9) | 1.1 (0.43–2.65) |
| | Milk yield | <10 litters | 31 | 6 (19.4) | 18.6 (<0.01) | Reference | <0.01 | | 10–20 litters | 90 | 25 (27.8) | 1.6 (0.59–4.37) | | >20 litters | 65 | 37 (56.9) | 5.5 (1.99–16.23) |
| | Breeding methods | AI | 93 | 46 (49.5) | 13.7 (<0.01) | 4.1 (1.43–11.83) | <0.05 | | Natural | 67 | 17 (25.4) | 1.4 (0.47–4.38) | | Both | 26 | 5 (19.5) | Reference |
| | Management condition | Poor | 56 | 33 (58.9) | 20.2 (<0.01) | 12.9 (2.73–61.14) | <0.01 | | Medium | 110 | 33 (30.0) | 3.8 (1.71–6.55) | | Good | 21 | 3 (10.0) | Reference |
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