J. Anim Sci.
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J. Anim Sci. 1966. 25:1159-1163.
© 1966 American Society of Animal Science
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Effect of Uterine Extracts and Uterine or Ovarian Blood Vessel Ligations on Ovarian Function of Ewes1

Guy H. Kiracofe2, C. S. Menzies3, H. T. Gier4 and H. G. Spies3

Kansas State University, Manhattan

Abstract

Injections of ether-soluble extracts or lyophilized homogenates of uteri from ewes at various stages of the estrous cycle failed to promote regression of corpora lutea in hysterectomized ewes. Regression of corpora lutea, estrus and subsequent ovulation in the cycling ewe was prevented by hysterectomy performed as late as the calculated last day of the cycle.

Bilateral ligation of middle uterine arteries and veins in intact nongravid ewes resulted in extended luteal maintenance in seven of eight ewes, while unilateral ligation resulted in prolonged luteal maintenance in only one of six ewes. Bilateral or unilateral ligation of the middle uterine arteries alone, excluding the vein, did not alter estrous cycles. Ligation of major ovarian vessels resulted in regression of corpora lutea in 29 of 37 hysterectomized ewes. Blood supply was reestablished following ligation and an increased number of ovulations resulted.

Footnotes

1 This investigation was supported in part by funds provided by Grant HD-00392 from the National Institutes of Health. Contribution No. 338, Department of Animal Husbandry and Contribution No. 354, Department of Zoology, Kansas Agricultural Experiment Station, Manhattan, Kansas.

2 Present address: Department of Anatomy, University of Kentucky Medical Center, Lexington, Kentucky.

3 Department of Animal Husbandry, Kansas State University, Manhattan, Kansas.

4 Department of Zoology, Kansas State University, Manhattan,Kansas.






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