Serum concentration of anti-Müllerian hormone and its relationship with ovarian reserve in Brahman oocyte donors

Objetive. To evaluate the relationship of AMH blood concentration with ovarian follicular count and in vitro embryo production in female Brahman cattle. Material and methods. To standardize the AMH quantification for Brahman oocyte donors, experiment 1 was performed, blood samples were taken from 10 heat synchronized Brahman females, in three different days of the estrous cycle, with more than 90 days postpartum and with normal reproductive evaluation. Serum concentration of AMH was determined with a commercial immunoenzymatic kit. In experiment 2, blood samples were taken from 100 non-synchronized Brahman oocyte donors, an ovum pick-up session was performed for in vitro embryo production and the number of follicles greater than 2 mm in the two ovaries was registered. Results. There were no differences in AMH concentration between the evaluated days of estrous cycle and a correlation of 0.82 (p<0.001) was found between antral follicle population (AFP) and AMH concentration. Serum AMH concentration ranged from 0.02 to 2.69 ng/ml in Brahman oocyte donors. Also, a correlation of 0.73 (p<0.001) between AMH and AFP and 0.54 between the AMH and the percentage of blastocysts were found in donors. Conclusions. The AMH can be used as a satisfactory endocrine marker of ovarian reserve prediction for in vitro embryo production in Brahman cattle.