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The effect of immunoneutralization of PMSG near a gonadotropin-induced oestrus on the reproductive performance of gilts

Published online by Cambridge University Press:  02 September 2010

R. N. Kirkwood ,
A. J. Peacock ,
T. A. Van Lunen  and
P. A. Thacker
R. N. Kirkwood
Affiliation:
Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0
A. J. Peacock
Affiliation:
Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0
T. A. Van Lunen
Affiliation:
Agriculture Canada Experimental Farm, Nappan, Nova Scotia, Canada B0L 1C0
P. A. Thacker
Affiliation:
Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0
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Abstract

In four experiments, 189 gilts either received PMSG antiserum around the time of a PMSG- (experiments 1, 2 and 3) or PMSG/hCG-induced (experiment 4) oestrus or served as controls. Ovulation rates were not affected by treatment. There was no treatment effect on pregnancy rate (experiments 2, 3 and 4). In experiment 2, numbers of embryos in PMSG-treated control gilts were quite low and were higher (P < 0·05) in those gilts subsequently receiving anti-PMSG treatment. In experiment 3, the mean number of embryos in control gilts were higher than in experiment 2 and there was no effect of immunoneutralization of PMSG. No treatment effect was evident in PMSG/hCG treated gilts (experiment 4). These data indicate that the immunoneutralization of PMSG is unlikely to improve the reproductive performance of gilts following a gonadotropin-induced oestrus except in gilts that otherwise would have poor performance.

Keywords

giltsimmune serumPMSGreproduction
Type
Research Article
Information
Animal Production , Volume 58 , Issue 3 , June 1994 , pp. 401 - 404
Copyright
Copyright © British Society of Animal Science 1994

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