HORMONAL AND BIOCHEMICAL CHANGES DURING THE TRANSITION PERIOD IN HOLSTEIN FRISIAN COWS

MOHAMED, NESREEN ELSAYED; ARAFA MOHAMED, MAHMOUD MOHAMED; ALI, AL-SAGHER OMRAN; MOHAMED, ADEL EL-SAYED AHMED

doi:10.21608/avmj.2025.314257.1360

	HORMONAL AND BIOCHEMICAL CHANGES DURING THE TRANSITION PERIOD IN HOLSTEIN FRISIAN COWS
Assiut Veterinary Medical Journal
Volume 71, Issue 184, January 2025, Page 713-727 PDF (589.67 K)
Document Type: Research article
DOI: 10.21608/avmj.2025.314257.1360
View on SCiNiTO
Authors
NESREEN ELSAYED MOHAMED ¹; MAHMOUD MOHAMED ARAFA MOHAMED²; AL-SAGHER OMRAN ALI³; ADEL EL-SAYED AHMED MOHAMED⁴
¹Department of Biochemistry, Animal Health Research Institute, Agriculture Research Center, Sohag, Egypt.
²Department of Biochemistry, Animal Health Research Institute, Agriculture Research Center, Dokii, Egypt
³Division of Infectious Diseases, Animal Medicine Department, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt.
⁴Division of Clinical Laboratory Diagnosis, Department of Animal Medicine, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt.
Abstract
Dairy animals are very important for production in Egypt. The transition period is a critical period for animals which undergo different hormonal and biochemical changes. The present study was established to evaluate the effect of the transition period on some physiological and biochemical parameters in dairy cows. A number of 30 pregnant dairy Holstein cows were used for this study. Samples of animals were collected at the 2^nd, 4^th,and 6^th week before calving, and at the 2^nd, 4^th,and 6^th week after calving with a two-week interval. Also, samples from ration and water delivered to animals were collected for analysis of their contents. The result of the present study revealed a significant (p<0.05) increase in the level of progesterone, estrogen, prolactin, glucose, and MDA with a significant decrease in the level of cortisol, GSH, SOD, Ca, and P at the 2^nd week before calving, compared to the 6^th week before calving. There was a significant decrease (p<0.05) in the level of progesterone, estrogen, glucose, SOD, Ca, and P with a significant increase in insulin and prolactin levels at the 2^nd week after calving compared to the 6^th week before calving. Lastly, there was a significant increase in progesterone, estrogen, cortisol, glucose, and haptoglobin with a significant decrease (p < 0.05) in the levels of prolactin and GSH in the 2^nd week after compared to the 6^th week after calving.
Keywords
SOD; MDA; GSH; Haptoglobin& Ca


Statistics Article View: 157 PDF Download: 86