J. Anim Sci.
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J. Anim Sci. 1973. 36:1137-1138.
© 1973 American Society of Animal Science
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Effect of Superovulation on Litter Size of Swine at 70 Days of Gestation1, 2,

W. A. Deneke and B. N. Day

Missouri Agricultural Experiment Station,3 Columbia 65201

Abstract

A single injection of 1,500 IU of PMS following synchronization of estrus in gilts resulted in a significant (P<.01) increase in litter size at day 70 of gestation. Gilts injected with PMS to induce super-ovulation had an average of 12.9 more corpora lutea and 2.5 more live fetuses than control gilts. There was little difference between treatments in mean fetal weight at day 70 of gestation.

Footnotes

1 Contribution from the Missouri Agricultural Experiment Station. Journal Series No. 6451. Approved by the Director.

2 The authors express their appreciation to Ayerst Laboratories, New York, N.Y. for providing the Methallibure, PMS and HCG used in this study and to Mrs. Betty Nichols for secretarial assistance in the preparation of the manuscript.

3 Department of Animal Husbandry.






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Copyright © 1973 by the American Society of Animal Science.