Associations between prebreeding serum micronutrient concentrations and pregnancy outcome in beef cows.
J Am Vet Med Assoc
; 238(10): 1323-32, 2011 May 15.
Article
en En
| MEDLINE
| ID: mdl-21568779
OBJECTIVE: To determine associations between serum concentrations of copper, molybdenum, selenium, vitamin A, and vitamin E measured in beef cows at the start of the community pasture breeding season and pregnancy status at the end of the season. DESIGN: Prospective cohort study. ANIMALS: 771 beef cows from 39 cow-calf herds. PROCEDURES: Serum micronutrient concentrations were measured in samples collected from cows on arrival at 5 different community pastures in Saskatchewan, Canada, in May 2008. Cows were palpated transrectally to determine pregnancy status in October 2008. Herd owners and professional herd managers were surveyed to collect individual data for cows (age, calving date, and history of exposure to bulls before the start of the breeding season) and information on herd and breeding management. Associations between animal-, herd-, and pasture-level variables and pregnancy status were examined. RESULTS: Serum concentrations of selenium, molybdenum, vitamin A, and vitamin E were not associated with pregnancy status after accounting for prebreeding body condition score, age, and calving-to-breeding interval. Serum copper concentrations were more commonly assessed as below adequate than were other micronutrients. Decreased serum copper concentrations were associated with increased odds of nonpregnancy in cows < 10 years of age. CONCLUSIONS AND CLINICAL RELEVANCE: Prebreeding micronutrient supplementation programs should be carefully managed in herds with poor reproductive performance in areas known to be copper deficient, and evaluation of serum copper concentrations from a subset of cows should be considered before the start of the breeding season.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Preñez
/
Resultado del Embarazo
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Micronutrientes
Tipo de estudio:
Etiology_studies
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Incidence_studies
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Observational_studies
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Risk_factors_studies
Límite:
Animals
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Pregnancy
Idioma:
En
Revista:
J Am Vet Med Assoc
Año:
2011
Tipo del documento:
Article
País de afiliación:
Canadá
Pais de publicación:
Estados Unidos