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Information × Registration Number 0226U001645, (0121U108834) , R & D reports Title To investigate the effect of heat stress on reproductive function of animals and to develop methods of correction popup.stage_title Дослідити вплив теплового стресу на відтворювальну функцію тварин та розробити методи її корекції Head Sharan Mykola M., Доктор сільськогосподарських наук Registration Date 29-01-2026 Organization Institute of Animal Biology of the National Academy of Agrarian Sciences of Ukraine popup.description1 Find out the effects of heat stress on the reproductive ability of productive animals and develop methods for its correction popup.description2 It has been found that heat stress has a negative impact on hematological parameters of breeding animals of farm animals, reducing the number of erythrocytes, hemoglobin and hematocrit. Under the influence of heat stress, the main biochemical parameters of the blood deteriorate. At the same time, heat stress stimulates the secretion of cortisol in breeding animals, probably reducing the concentration of testosterone in the blood, reducing the sexual activity of males. Heat stress causes a decrease in the volume of ejaculate, sperm concentration in the ejaculate, sperm motility and survival, and a probable decrease in the activity of enzymes-markers of the fertilization ability of succinate dehydrogenase and cytochrome oxidase. Heat stress negatively affects the endocrine system, follicle development and embryonic development, which is confirmed by a significant (P<0.05-0.01) increase in progesterone concentration after insemination and fertilization of cows, an increase in the insemination index and a decrease in early embryonic mortality. Feeding vitamins A, D3, E, and C with zinc gluconate and betaine in the form of liposomal emulsion normalizes hematological and biochemical blood parameters of fertile animals during heat stress. Under the influence of feeding complex liposomal supplements, the concentration of cortisol decreases and the level of testosterone in the blood of fertile animals significantly increases, as a result of which their sexual activity increases, the quantitative and qualitative indicators of sperm increase, as well as the fertilizing ability of sperm (P<0.05-0.001). Injection of a complex liposomal preparation (Gn-RH, vit. A, D, E, Zn, Se) during insemination of cows under the influence of heat stress normalizes the endocrine system, ensuring normal follicle growth, formation of a functional corpus luteum, which leads to an increase in fertilization with a simultaneous decrease in the insemination index and service period. Product Description popup.authors Oleksandr B. Andrushko Ivan I. Hevkan Grymak Khrystyna M Andriy R. Korbetskyy Iryna M. Yaremchuk Serhii B. Korniat Zinovii V. Tatomyr Vitalii V. Fedorovych Ivan T. Ivanytskyi popup.nrat_date 2026-01-29 Close