In conclusion,injections of vitamin C and E did not affect either the development of the preovulatory follicle and the corpus luteum or pregnancy ratesin Holstein dairy cattle under heat stress conditions.
📌 3 Maddede Bu Makale
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Amaç & Hipotez:This study evaluated the effect of injecting vitamin C (VC) and E (VE) on size of the preovulatory follicle, volume of the corpusluteum, and pregnancy rates in Holstein cows under heat stress conditions (temperature humidity index > 74).
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Temel Bulgular & Veri:Sixty-two cows wererandomly assigned to one of four treatments: 1, control, n = 15: cows were not supplemented with vitamins; 2, VCG, n = 15: cows weresimultaneously injected i.v. with 500 and s.c. with 2500 mg of VC before and after estrus; 3, VEG, n = 15: cows received an i.m. injectionof 3000 IU of VE before estrus; 4, VCEG, n = 17: cows were injected with VC and VE in the same way and doses as in treatments 2 and3.
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Sonuç & Katkı:In conclusion,injections of vitamin C and E did not affect either the development of the preovulatory follicle and the corpus luteum or pregnancy ratesin Holstein dairy cattle under heat stress conditions.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Alan Parametreleri
Abstract
This study evaluated the effect of injecting vitamin C (VC) and E (VE) on size of the preovulatory follicle, volume of the corpusluteum, and pregnancy rates in Holstein cows under heat stress conditions (temperature humidity index > 74). Sixty-two cows wererandomly assigned to one of four treatments: 1, control, n = 15: cows were not supplemented with vitamins; 2, VCG, n = 15: cows weresimultaneously injected i.v. with 500 and s.c. with 2500 mg of VC before and after estrus; 3, VEG, n = 15: cows received an i.m. injectionof 3000 IU of VE before estrus; 4, VCEG, n = 17: cows were injected with VC and VE in the same way and doses as in treatments 2 and3. Treatment did not significantly affect any of the measured variables, despite a numerical increase in pregnancy rates in cows injectedwith vitamins (7.5 ± 7.3%, 9.6 ± 9.4%, 15.1 ± 10.0%, and 18.34 ± 9.9% for control, VCG, VEG, and VCEG, respectively). In conclusion,injections of vitamin C and E did not affect either the development of the preovulatory follicle and the corpus luteum or pregnancy ratesin Holstein dairy cattle under heat stress conditions.
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Bu Makaleye Atıf Yap
GOZALEZ-MALDONADO, J., RANGEL-SANTOS, R., LARA, R. R., RAMIREZ-VALVERDE, G. (2022). Impacts of vitamin C and E injections on ovarian structures and fertility in Holstein cows under heat stress conditions. Turkish Journal of Veterinary and Animal Sciences, Cilt: 41 - Sayı: 3, 345–350. https://ajindex.com/articles/615045
De Rensis F, Scaramuzzi RJ. Heat stress and seasonal effects on reproduction in the dairy cow: a review. Theriogenology 2003; 60: 1139-1151
Hansen PJ. Cellular and molecular basis of therapies to ameliorate effects of heat stress on embryonic development in cattle. Anim Reprod 2013; 10: 322-333
Calamari L, Maianti MG, Amendola F, Lombardi G. On some aspects of the oxidative status and on antioxidants in blood of dairy cows during summer. In: Proceedings of the XIII Associazione Scientifica Produzioni Animali Congress. Piacenza, Italy: ASPA; 1999. pp. 452-454
Padilla L, Matsui T, Kamiya Y, Kamiya M, Tanaka M, Yano H. Heat stress decreases plasma vitamin C concentration in lactating cows. Livest Sci 2006; 101: 300-304
Ranjan R, Ranjan A, Dhaliwal GS, Patra RC. L-ascorbic acid (vitamin C) supplementation to optimize health and reproduction in cattle. Vet Quart 2012; 32: 145-150
Allison RD, Laven RA. Effect of vitamin E supplementation on the health and fertility of dairy cows: a review. Vet Rec 2000; 147: 703-708
Luck MR, Jeyaseelan I, Scholes RA. Ascorbic acid and fertility. Biol Reprod 1995; 52: 262-266
Das P, Chowdhury M. Vitamin E-deficiency induced changes in ovary and uterus. Mol Cell Biochem 1999; 198: 151-156
Howell JL, Fuquay JW, Smith AE. Corpus luteum growth and function in lactating Holstein cows during spring and summer. J Dairy Sci 1994; 77: 735-739
Wilson SJ, Kirby CJ, Koenigsfeld AT, Keisler DH, Lucy MC. Effects of controlled heat stress on ovarian function of dairy cattle
Heifers. J Dairy Sci 1998; 81: 2132-2138
Lopes AS, Butler ST, Gilbert RO, Butler WR. Relationships of preovulatory follicle size, estradiol concentrations and season to pregnancy outcome in dairy cows. Anim Reprod Sci 2007; 99: 34-43
Canadian Council on Animal Care in Science. CCAC Guidelines on: The Care and Use of Farm Animals in Research, Teaching and Testing. 1st ed. Ottawa, ON, Canada: Canadian Council on Animal Care; 2009
García E. Modificaciones del Sistema de Clasificación Climática de Köppen. 4th ed. UNAM, México: Instituto de Geografía; 1988 (in Spanish)
Mader TL, Davis MS, Brown-Brandl T. Environmental factors influencing heat stress in feedlot cattle. J Anim Sci 2006; 84: 712-719
Srikandakumar A, Johnson EH. Effect of heat stress on milk production, rectal temperature, respiratory rate and blood chemistry in Holstein, Jersey and Australian Milking Zebu cows. Trop Anim Health Pro 2004; 36: 685-69