J. Anim Sci.
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J. Anim Sci. 1970. 30:225-228.
© 1970 American Society of Animal Science
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Local Effects of Embryos and the Uterus on Corpora Lutea in Gilts1

G. D. Niswender2, P. J. Dziuk, C. C. Kaltenbach3 and H. W. Norton

University of Illinois, Urbana4

Abstract

Unilateral maintenance of CL occurred on the ovary ipsilateral to the pregnant uterine horn in gilts made unilaterally pregnant on day 2, but bilateral maintenance of CL occurred when gilts were made unilaterally pregnant after day 12. The signal for maintenance is mediated unilaterally. Increasing the embryo:CL ratio from 1:2 to 2:1 did not affect progesterone content of the CL. The concentration of progesterone in CL from gilts with one oviduct resected was higher than that in controls. In gilts which had one oviduct resected, both the total content and concentration of progesterone were higher in CL on the intact side than on the resected side.

Footnotes

1 This study was supported in part by Public Health Service Research Grant HD01987 from the National Institute of Child Health and Human Development.

2 Present address: Department of Pathology, Medical School, University of Michigan, Ann Arbor.

3 Present address: Department of Animal Science, University of Wyoming, Laramie.

4 Department of Animal Science.






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Copyright © 1970 by the American Society of Animal Science.