Abstract
Association Between Postpartum High Β-Hydroxybutyrate and/or Non-Esterified Fatty Acids and Plasma Metabolites, Body Condition and Reproductive Performance in Dairy Cows
Highlights
Subclinical ketosis is a common disorder of dairy cows during peripartum
The present study aims to assess how high post-partum blood non-esterified fatty acids (NEFA) and BHBA levels, considered either separately or together, may improve the prediction of estrus cycling and first service pregnancy status (PRAI1) in dairy cows
Cows with high NEFA and BHBA had a significantly higher body condition score (BCS) at calving compared to the other groups and a significantly lower BCS at days in milk (DIM) 52 compared to cows with low BHBA and NEFA (Figure 1A)
Summary
Subclinical ketosis is a common disorder of dairy cows during peripartum. In the recent literature, β hydroxybutyrate (BHBA) and non-esterified fatty acids (NEFA) have been used as markers of peripartum negative energy balance [1] or subclinical ketosis [2] There is evidence that these two markers cannot be used interchangeably [3]. High pre- and postpartum NEFA or BHBA concentrations were the main risk factors for health disorders and poor reproductive performance These studies considered only one of the biomarkers to evaluate subclinical ketosis or a highly negative energy balance. The present study aims to assess how high post-partum blood NEFA and BHBA levels, considered either separately or together, may improve the prediction of estrus cycling and first service pregnancy status (PRAI1) in dairy cows
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