The use of insulin to improve fertility of timed-inseminated postpartum suckled beef cows Uso de insulina para aumento da fertilidade de vacas de corte pós-parto lactantes inseminadas

The objective of this work was to evaluate the effect of insulin alone or in association with equine chorionic gonadotropin (eCG) on the fertility of postpartum beef cows subjected to synchronization. A total of 340 cows was subjected to fixed time artificial insemination. In the trial 1, the cows w...

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Bibliographic Details
Main Authors: Augusto Schneider, Luiz Francisco Machado Pfeifer, Eduardo Schmitt, Ivan Bianchi, Marcelo Brandi Vieira, Eduardo Gularte Xavier, Francisco Augusto Burkert Del Pino, Marcio Nunes Corrêa
Format: Article
Language:English
Published: Embrapa Informação Tecnológica 2010-10-01
Series:Pesquisa Agropecuária Brasileira
Subjects:
eCG
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010001000023
Description
Summary:The objective of this work was to evaluate the effect of insulin alone or in association with equine chorionic gonadotropin (eCG) on the fertility of postpartum beef cows subjected to synchronization. A total of 340 cows was subjected to fixed time artificial insemination. In the trial 1, the cows were subjected to temporary weaning (TW), while in the trial 2 the same protocol was tested without TW. The addition of an insulin injection to a progesterone/eCG-based protocol without TW increased the pregnancy rate of beef cows with body condition score (BCS) equal to or lower than 2.5. Insulin had no effect on cows submitted to TW or with BCS equal to or higher than 3.0.<br>O objetivo deste trabalho foi avaliar apenas o efeito da insulina ou dela em associação com gonadotrofina coriônica equina (eCG) na fertilidade de vacas em pós-parto submetidas à sincronização. Um total de 340 vacas foi submetido à inseminação artificial em tempo fixo. No experimento 1, as vacas foram submetidas ao desmame temporário (DT), enquanto no experimento 2, o mesmo protocolo foi testado sem DT. A adição de uma injeção de insulina a um protocolo baseado em progesterona/eCG sem DT aumentou a taxa de prenhez de vacas de corte com escore de condição corporal (ECC) igual ou menor que 2,5. A insulina não teve efeito em vacas submetidas a DT ou com ECC igual ou maior que 3,0.
ISSN:0100-204X
1678-3921