Publication: Development of estrous synchronization protocols using melengestrol acetate in Bos indicus cattle
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Coadvisor
Graduate program
Undergraduate course
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Publisher
Amer Soc Animal Science
Type
Article
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Acesso restrito
Abstract
Five experiments were conducted on commercial farms in Brazil designed to develop the basis for an estrus synchronization protocol using melengestrol acetate (MGA) in Bos indicus cattle. These studies resulted in the development of the following protocol: 0.5 mg.d(-1) of MGA between d -14 and -1; 2.0 mg i.m. injection of estradiol cypionate on d -9; 48 h temporary weaning between d 0 and 2; and natural service beginning on d 0. The basis of this protocol was to induce estrous cyclicity before postpartum loss of body condition, prevent premature luteolysis, eliminate the need for labor required to detect estrus, and consequently increase the likelihood of pregnancy early during the postpartum period. This treatment effectively induced estrous cyclicity among anestrous cows, synchronized estrus activity, and prevented premature luteolysis with no negative effect on pregnancy.
Description
Keywords
anestrous, Bos indicus, estrous synchronization, melengestrol acetate
Language
English
Citation
Journal of Animal Science. Champaign: Amer Soc Animal Science, v. 87, n. 6, p. 1981-1990, 2009.
