J. Anim Sci.
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J. Anim Sci. 1969. 28:492-495.
© 1969 American Society of Animal Science
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Histological Changes in the Uterine Horns during the Estrous Cycle in the Ewe in Relation to the Proximity of the Corpus Luteum1

J. G. Cloud and L. E. Casida

University of Wisconsin, Madison

Abstract

Histological characteristics of the uterine horns at various distances from the tubouterine junction at different times in the estrous cycle were studied to test the possibility of a local effect of the corpus luteum upon the adjacent uterine horn in the ewe. The height and the appearance of the epithelial cells lining the lumen of the uterine horn changed during the cycle but were similar throughout the horn. The uterine circular musculature (muscle mass and cell size), however, changed differently in the anterior as compared to the posterior portion of the uterus during the first half of the cycle. There was no evidence of a local effect of the corpus luteum.

Footnotes

1 This work was done under a cooperative agreement between the Research Division of the College of Agricultural and Life Sciences, University of Wisconsin, and the Animal Husbandry Research Division, A.R.S., U.S.D.A. It was supported in part by Public Health Service Training Grant No. 5 T01 HD00-104-02 from the National Institute of Child Health and Human Development; The Ford Foundation, Grant No. 63-505; and by the Program Project in Genetics, Grant No. GM 15422, from the National Institute of Health. Published with the approval of the Director of the Research Division of the College, Paper No. 1276 from the Laboratory of Genetics.






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Copyright © 1969 by the American Society of Animal Science.