Risk factors for repeat breeder dairy cows and their impacts on reproductive performance

• Published in: Korean journal of veterinary research Vol. 62; no. 2; pp. 15.1 - 15.8
• Main Authors: Jeong, Jae-Kwan, Kim, Ill-Hwa
• Format: Journal Article
• Language: Korean
• Published: 2022
• Subjects: risk factors; repeat breeder cow; breeding time; reproductive performance; postpartum disorder
• ISSN: 2466-1384; 2466-1392

The objective of this study was to identify risk factors for repeat breeder dairy cows and their impact on reproductive performance. The characteristics of 1,504 cows, including their peripartum health, nutrition, production, and reproduction, were collected. Cows with metabolic disorder were significantly more likely (odds ratio [OR], 2.47; p < 0.001) and cows with clinical endometritis tended to be more likely (OR, 1.35; p < 0.1) to become repeat breeders than cows without metabolic disorder and clinical endometritis, respectively. Cows initially inseminated > 80 days after calving were less likely (OR, 0.78; p < 0.05) to become repeat breeders than cows initially inseminated ≤ 80 days after calving. As a result, repeat breeding in dairy cows resulted in a 90 day longer (p < 0.0001) mean interval from calving to pregnancy. In conclusion, postpartum metabolic disorder, clinical endometritis, and a short interval from calving to initial insemination were risk factors for repeat breeder dairy cows, resulting in a severely impaired reproductive performance.