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A note on the effects of exogenous progesterone and oestrone during early gestation on farrowing performance in gilts

Published online by Cambridge University Press:  02 September 2010

J. W. Knight ,
D. L. Dalton  and
K. L. Bryant
J. W. Knight
Affiliation:
Department of Animal Science, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
D. L. Dalton
Affiliation:
Department of Animal Science, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
K. L. Bryant
Affiliation:
Department of Animal Science, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
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Abstract

Administration of exogenous progesterone (0-55 mg/kg live weight) and oestrone (0-275μg/kg live weight) during various discrete intervals between days 4 and 30 of gestation elicited variable results depending upon the time and duration of administration. Administration of the combined steroids early in gestation (days 4 to 20, trial 1; days 4 to 12, trial 2) tended to affect farrowing performance adversely. In general, advantageous effects on farrowing performance occurred when treatment with exogenous progesterone and oestrone was initiated at day 12 or later of gestation.

Type
Research Article
Information
Animal Production , Volume 37 , Issue 1 , August 1983 , pp. 141 - 144
Copyright
Copyright © British Society of Animal Science 1983

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References

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