The concentration of anti-muller hormone in the blood serum of reindeer depends on the level of sex hormones

Reindeer  husbandry  is  the  leading branch of agriculture for the regions of the Far  North.  Reindeer  (Rangifer  tarandus) remains  poorly  studied  from  the  point  of view  of  genetics  and  reproduction,  which hinders the intensification of development of the industry. Research is being actively conduct in the field of genetics of the productive qualities of reindeer, but the formation and functioning  of  its  reproductive  system  has been little study. Hormonal regulation of the reproductive  process  and  the  formation  of hormonal status at key stages of the reproductive cycle is a significant aspect of animal reproduction. Reindeer are characterized by a pronounced seasonality of reproduction, and the study of hormonal regulation of the reproductive cycle is the main aspect of the further use of assisted reproductive technologies. The work is devoted to the analysis of the  level  of  anti-Mullerian  hormone  in  females during the breeding season. The studies were carried out on reindeer farms of the MAU “Directorate of the Territory of Traditional Natural Resources Management  of  Soyots”,  Buryatia,  (female, n=29). The dependence of the concentration of anti-Müllerian hormone (AMH), which is a generally accepted indicator of the female ovarian reserve, on the concentration of sex hormones  (progesterone,  estradiol,  testosterone and luteinizing hormone) in the blood serum of females was study. Hormone levels were  determined  by  enzyme  immunoassay. A higher content of sex hormones - testosterone,  estradiol,  progesterone  and  luteinizing  hormone  was  revealed  in  the  group  of women  with  an  AMH  concentration  of  >1 ng/ml than in the group of women with an AMH concentration of <1 ng/ml. The significance of the differences in progesterone was p<0.05,  and  in  estradiol – p<0.001.  A  low concentration  of  AMH  (<1  ng/ml),  characterizing a reduced ovarian reserve of female reindeer,  corresponds  to  a  reduced  concentration of sex hormones that support reproductive  function,  and,  conversely,  a  high concentration of AMH (>1 ng/ml), and, accordingly, a high ovarian reserve the reserve corresponds to an increased concentration of sex hormones - testosterone, estradiol, progesterone and luteinizing hormone.