Volume 57 Supplement 1

Animal Obesity - causes, consequences and comparative aspects: meeting abstracts

Open Access

Impaired insulin sensitivity and reduced fertility in obese dairy cows

Acta Veterinaria Scandinavica201557(Suppl 1):O11

https://doi.org/10.1186/1751-0147-57-S1-O11

Published: 25 September 2015

Introduction

The body condition score (BCS) at calving and the degree of BCS losses post-partum (PP) are associated with milk production, reproduction, and health. Collective data indicate that, at parturition, a BCS around 3.50 on a five graded scale, where 1 is emaciated and 5 is obese, will minimize BCS-related health and fertility disorders and allow high milk yield.

Objective

The objective of this study was to evaluate the effects of body condition at parturition on the metabolism with focus on insulin sensitivity (IS) and on fertility as reflected by milk progesterone profiles.

Material and methods

Multiparous cows (n=74) at the Swedish Livestock Research Centre Lövsta, with BCS from 2 to 4.25 the first week PP were enrolled. Insulin, non-esterified fatty acids (NEFA), glucose and insulin like growth factor 1 was determined week two PP. The Revised Quantitative Insulin Sensitivity Check Index (RQUICKI) was used to estimate IS. Progesterone in milk was determined twice weekly during weeks 2-12 PP.

Results

IS was negatively related to BCS. None of the other measured plasma parameters were significantly affected. Among over-conditioned cows (BCS >3.75) 55 % showed progesterone profiles that deviated from normal. Corresponding figures for thin (BCS<3.25) and adequately (BCS 3.25-3.75) conditioned cows were 35 and 27% respectively.

Conclusion

The negative relationship between BCS and IS supports studies indicating that overfeeding prior to parturition impaired IS. BCS was related to fertility, as reflected by progesterone profiles, in a non-linear manner indicating that fertility of both thin and over-conditioned cows was negatively affected.

Authors’ Affiliations

(1)
Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences
(2)
Department of Clinical Sciences, Swedish University of Agricultural Sciences

Copyright

© O'Hara et al. 2015

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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