Serum biochemical parameters and embryo production during superovulatory treatment in dairy cattle |
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| Institution: | 1. College of Veterinary Medicine, Hunan Agricultural University, Changsha, Hunan 410128, PR China;2. Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine, Texas A&M University, College Station, TX 77843, USA;1. Department of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai’an, Shandong 271018, PR China;2. Department of Life Sciences, Shandong Agricultural University, Tai’an, Shandong 271018 PR China;1. Clinic for Veterinary Obstetrics, Gynaecology and Andrology, Department of Molecular Reproductive Medicine, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Frankfurter Strasse 106, D-35392 Giessen, Germany;2. Steroid Research and Mass Spectrometry Unit, Center of Child and Adolescent Medicine, Faculty of Medicine, Justus-Liebig-University Giessen, Feulgenstrasse 10-12, D-35392 Giessen, Germany;1. Department of Animal Sciences, Faculty of Agriculture, Food and Environment, The Hebrew University, Rehovot, Israel;2. Mastitis Reference Center, The Veterinary Institute, Bet Dagan, Israel;3. Cattle Breeders Association, Caesarea, Israel;4. Institute of Animal Science, Agricultural Research Organization, Bet-Dagan, Israel;1. College of Life Science and Technology, Southwest Minzu University, Chengdu, Sichuan, 610041, China;2. Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation of Ministry of Education, Chengdu, Sichuan, 610041, China |
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| Abstract: | The objective of this study was to determine the relationship between the number of transferable embryos (TE) and various blood chemistry parameters as a reflection of the metabolic state of cows after superovulatory treatment. Forty-nine Holstein cows were subjected to superovulatory treatment for commercial embryo production. At the time of embryo harvest, individual blood samples were taken from cows for biochemical analysis. All embryos including dead ones as well as non-fertilized oocytes were counted in uterine lavage. Feed samples collected daily for a period of two weeks before embryo harvest, were analyzed for mycotoxins: vomitoxin, zearalenone and T-2 toxin. On average, cows produced 9.45 ± 5.60 embryos and oocytes of which 5.27 ± 4.20 were TE, 0.37 ± 0.80 were dead embryos and 3.82 ± 3.78 were non-fertilized oocytes. Higher concentrations of Mg and K were associated with a higher production of TE (p = 0.005 and p = 0.043, respectively) and higher activity of creatinine kinase was associated with a lower production of TE (p = 0.011). |
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