Physiological and biochemical changes in the body of cows during pregnancy, natal and postnatal processes

Zamaziy, А.А.; Кambur, M.D.

Physiological and biochemical changes in the body of cows during pregnancy, natal and postnatal processes

2024

Zamaziy, А.А. | Кambur, M.D.

The article presents a study of physiological and biochemical changes in the organism of cows during pregnancy, natal and the postnatal process. It has been established that after birth, the amount of protein in the blood of animals increases due to α, β and γ-globulins by 17.2, 18.8 and 32% (p <0.01), respectively. The concentration of glucose in the blood of cows during intensive lactation before labor is reduced by 28.8%, and during delivery is increased by 42.2%. During the first lactation period, the glucose content in the blood of cows is reduced by 1.52 times (p <0.01). The dynamics of metabolites of lipid metabolism in the body of cows has a wave-like dynamics. The content of cholesterol and β-lipoprotein, as precursors for the synthesis of steroid hormones, decreases in the first period after delivery and rises by 1,32 times by the middle of the first lactation period (p <0,01). During labor, the content of β-lipoproteins and cholesterol decreases by 38–42%. The content of inorganic phosphorus in the blood of cows at the beginning of birth was less by 25.6% than at the beginning of dry period. The concentration of sodium in the blood of cows increases during childbirth by 5.08%, and potassium by 5.25%. It was established that at the beginning of dry period, the concentration of calcium in the blood of cows was 38.4% higher than at the end of this period, before giving birth. The dynamics of calcium content in the blood of cows is mainly associated with the formation of fetus bone system, the increase of its fixation by uterus tissues, aimed at the development of labor process.

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