Influence of thyroid hormones on the development of inferior sexual cycles in dogs

Abstract

The aim of the work is to investigate the nature of influence of thyroid hormone at blood sample from the bitches on changes in the staging and duration of the sexual cycle, on the development of incomplete cycles (anovulatory, alibid, anestral, and areactive) and on the maturation of eggs (ovum) in bitches. This research is current because a large proportion of the causes of infertility in dogs and damages of their owners and breeders in problems of the formation of immature, non-viable eggs and the violation of the staging of sexual cycle in bitches. At this work, the functions of thyroid hormones, the nature and significance of the stages of the sexual cycle. Our research shows that the change in the content of thyroid hormones in the blood of the bitch has a direct effect on both the duration and the usefulness of the stages of the sexual cycle. The level of total thyroxin in the blood of the first test group was 11.2±0.9 nmol/l, in the second 4.15±0.35 nmol/l, in the third 6.95±0.85 nmol/l and in the fourth 23,95±7.75 nmol/l. The level of free thyroxine in the blood of the first test group was 8.75±0.45 nmol/l, the second 7.25±2.25 nmol/l, the third 8.9±1.6 nmol/ l and at the fourth 10,75±1.25 nmol/l. The indicators of droplets detector of the DRAMINSKI company for dogs in the stage of anestrus should fluctuate within 80-100 units, if the indices are equal to 100-250 units, then the bitch is diagnosed as infringement of a sexual cycle (inflammatory reaction or hormonal dysfunction). The research is curious not only to practicing veterinarians and scientists, but is also recommended for breeders and dog owners, counting on a favorable course of pregnancy and obtaining a healthy viable puppies.