J. Anim Sci.
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J. Anim Sci. 1968. 27:673-676.
© 1968 American Society of Animal Science
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Effect of Number of Embryos and Uterine Space on Embryo Survival in the Pig

P. J. Dziuk1, 2,

Illinois Agricultural Experiment Station, Urbana

Abstract

The uterine space available per embryo was changed from normal by varying the number of embryos or the length of the uterus in 130 pregnant gilts. Embryo survival rate was unaffected when the uterine space per embryo was greater or smaller than normal. Only when the average number of embryos was at least 14 did it appear likely that intrauterine crowding was a possible limiting factor in embryonal survival. Intrauterine crowding is therefore unlikely to be an important factor in early embryonal losses under usual conditions.

Footnotes

1 Department of Animal Science.

2 The author gratefully acknowledges the help of many colleagues in surgery and handling the animals. Appreciation is expressed to R. G. Zimbelman,The Upjohn Company, for the HCG and to R. Nuttall, Ayerst Laboratories, for methallibure and PMS.




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Copyright © 1968 by the American Society of Animal Science.