Abstract
Anti-Müllerian hormone (AMH) holds potential as a biomarker for assessing the superovulation (SO) response in cattle. Nonetheless, there exists scant information regarding this aspect in the literature concerning dairy heifers. Given this gap, our objective is to explore the viability of AMH as an indicator for gauging the SO response specifically in Holstein heifers. Furthermore, our aim encompasses examining the variations in AMH levels within the same individuals before and after undergoing SO. The study included 41 Holstein heifers. All heifers were superovulated and blood samples were taken both before and after the SO protocol. The findings revealed that the mean values of serum AMH concentrations before and after SO were 0.122ng/mL (0.093-0.248ng/mL) and 0.119ng/mL (0.084-0.170ng/mL), respectively. AMH concentrations in heifers were stratified into low (<0.106ng/mL), medium (0.107-0.126ng/mL) and high (>0.127ng/mL) categories both before and after SO. There was no significant correlation between AMH levels in the heifers both before and after SO treatment with the number of follicles, corpora lutea, total embryos collected or embryos transferred (p>0.05). Furthermore, this study showed that serum AMH concentrations in Holstein heifers did not change after SO treatment. In this study, as AMH levels in Holstein heifers were in a narrow range, a relationship between AMH and SO response could not be determined. In future studies, we believe that it would be more useful to plan more studies in Holstein donor heifers, taking into account the number of animals and AMH levels.
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