STUDY OF THE INFLUENCE OF BODY CONDITION ON THE DYNAMICS OF SEX HORMONES IN THE BLOOD OF BITCHES

Abstract

The physiological mechanisms of regulation of the reproductive function of bitches are well studied, however, the issue of individual characteristics of the body on the dynamics of sex hormones in the blood remained out of the attention of researchers. Therefore, we set ourselves the goal of studying the influence of body condition on the dynamics of sex hormones in the blood of bitches. The experiment was carried out on 15 bitches of the bull terrier breed with different body conditions according to the Body Condition Scoring scale. Three groups of animals were formed for the experiment: the control group was the ideal weight (the average BCS score was 5 points); I research group – low weight (average BCS score – 3.6 points); Group II – overweight (average BCS score – 6.6 points). For the first time, the dynamics of the content of sex hormones (progesterone, luteinizing hormone, follicle-stimulating hormone, estadiol) in the blood of bull terrier bitches with different body conditions was studied. New scientific data on the breed features of humoral regulation of the sexual cycle in the body of bitches have been obtained. The results of the studies indicate that factors such as overweight and low weight of bitches have an impact on the dynamics of sex hormones in the blood plasma of bitches during the sexual cycle. In particular, a significant effect of excess weight on the level of luteinizing hormone (P≤0.05) and progesterone (P≤0.05) at the stage of diestrus, on the level of progesterone (P≤0.05) at the stage of estrus was established. Low bitch weights were accompanied by higher levels of follicle-stimulating hormone at the proestrus stage (P≤0.05). Thus, our findings highlight that the characteristics of the corpus luteum of bitches and the synthesis of progesterone are influenced by many factors that have received little scientific attention to date.