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Interaction of blood supply to the porcine ovary and corpora lutea function

Published online by Cambridge University Press:  27 March 2009

W. F. Pope ,
Michelle S. Lawyer  and
N. L. First
W. F. Pope
Affiliation:
Department of Meat and Animal Science, University of Wisconsin, Madison, Wisconsin 53706, U.S.A.
Michelle S. Lawyer
Affiliation:
Department of Meat and Animal Science, University of Wisconsin, Madison, Wisconsin 53706, U.S.A.
N. L. First
Affiliation:
Department of Meat and Animal Science, University of Wisconsin, Madison, Wisconsin 53706, U.S.A.
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Summary

Forty-eight sows were partially hysterectomized on day 10 (day 0 = 1st day of oestrus) of the oestrous cycle such that the isolated-contralateral ovary received either an ovarian or an ovarian and uterine blood supply. These two treatments were examined for their ability to affect corpora lutea (CL) function when 10, 20, 40 and 80 cm (12 sows/group) of the ipsilateral uterine horn remained intact. Sows with only 10 cm of uterine tissue failed to return to oestrus when observed until day 40. When 80 cm of uterine tissue remained, all the sows recycled between days 20 and 24. As the length of uterine horn increased from 10 to 80 cm the contralateral ovary became susceptible to luteolysis. At these lengths (20–40 cm), increased blood supply to the contralateral ovary afforded the luteal cells resistance to luteolysis (uterine length × blood supply interaction, P < 0·05). An additional four sows received 125I-labelled microspheres for purposes of determining CL blood flow following these alterations of blood supply to the isolated ovary. Blood flow to the CL was increased in three of the four sows when the isolated ovary received an additional uterine blood supply. Results from these experiments support the concept of an involvement of blood flow in the regulation of CL function.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 108 , Issue 1 , February 1987 , pp. 97 - 101
Copyright
Copyright © Cambridge University Press 1987

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