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Synchronization of ovulation and fixed-time artificial insemination in beef cattle

Published online by Cambridge University Press:  09 April 2014

G. A. Bó  and
P. S. Baruselli
G. A. Bó*
Affiliation:
Instituto de Reproducción Animal Córdoba (IRAC), Zona Rural General Paz, 5145, Córdoba, Argentina Instituto A.P. de Ciencias Básicas y Aplicadas, Carrera de Medicina Veterinaria, Universidad Nacional de Villa María, Córdoba, Argentina
P. S. Baruselli
Affiliation:
Departamento de Reprodução Animal, FMVZ-USP, CEP 05508-000 São Paulo, Brazil
*
†E-mail: [email protected]
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Abstract

The main objective of the implementation of artificial insemination (AI) in cattle is to produce a sustained genetic progress in the herd. Although AI is an old reproductive biotechnology, its widespread implementation is very recent and is mainly because of the use of protocols that allows AI without oestrus detection, commonly called fixed-time artificial insemination (FTAI). The development of FTAI protocols also allowed the application of AI in larger, extensively managed herds and especially in suckled cows instead of restricting the breeding programmes to the heifers. Fixed-time AI treatments are widely used in South America, with about 3 000 000 cows inseminated in the last season in Argentina and about 8 000 000 in Brazil. The objective of this review is to present and describe the various treatments available and some of the factors that may affect pregnancy rates in beef cattle.

Keywords

beef cattlefixed-time artificial inseminationprogesteroneoestradiolGnRH
Type
Full Paper
Information
animal , Volume 8 , Supplement s1: New Science ‐ New Practices International Cow Fertility Conference 18‐21 May 2014, Westport, Ireland , May 2014 , pp. 144 - 150
Copyright
© The Animal Consortium 2014 

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