Relationship between sera anti müllerian hormone levels and fertility in holstein heifers an cows

Anti-Mullerian Hormone (AMH) concentrations and antral follicle numbers were positively related in cattle. Therefore, it can be used as a biomarker in determining the reserve of ovary, determination of oocyte quality, superovulation response, fertility, productive life. In this study, it was aimed to determine the relationship between serum AMH levels and fertility parameters in cows and heifers. A total of 44 heifers and 40 cows were used as materials in the study. The first insemination pregnancy rate in cows, the average number of insemination per pregnancy, pregnancy rates in groups in 200 days postpartum, open days were analyzed as fertility parameters. The first insemination pregnancy rates in heifers, and total pregnancy rates and average number of inseminations per pregnancy were compared. The lowest AMH level in the heifers and cows was 0.001 ng/ml and the highest level was 0.7 ng/ml in both groups. The mean AMH level in cows and heifers was 0.26 ± 0.17 and 0.21 ± 0.16 ng / ml ± SD, respectively (p>0.05). No significant relationship were found between the mean AMH levels of the pregnant and non-pregnant cows and heifers that were inseminated after AMH measurements (p>0.05). As a result, there was no relationship between pregnancy rates and AMH levels after insemination in heifers and cows. A remarkable finding was that the variation in AMH levels among individuals in both cows and heifers was very high. In order to reveal the relationship between AMH levels and fertility in cows, it is necessary to increase the knowledge on this subject by making new researches. Keywords: AMH, Fertility, Cow, Heifer.