Duration of anestrus in Pramenka and Romanov ewes in Yugoslavia
Article Abstract:
Pramenka ewes' seasonal anestrus was determined to assess the ewes' suitability as a genetic source for sheep breeding. Progesterone levels in peripheral blood were determined in 13 Pramenka and nine Romanov ewes from Jan to Oct 1988, and during a period covering lambing and breeding. Results showed that the anestrus periods of the two sheep breeds were similar. Non-gestating ewes also showed similar patterns in the plasma concentration of progesterone as those exhibited by gestating ewes. These findings also indicate that sexual activity is triggered in Pramenka ewes from June 19 to July 3.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Exogenous oxytocin dilates the cervix in ewes
Article Abstract:
Exogenous oxytocin was administered to ewes to find out if the hormone would dilate the cervix and facilitate the insertion of a stainless steel rod into the uterus. Different dosages of either pure oxytocin or a combination with estradiol were administered intravenously to ewes. The depth at which a stainless steel rod could be easily inserted into the cervix before and after hormone administration was measured. All doses distended the cervix and facilitated insertion of the rod. This implies that exogenous oxytocin can facilitate artificial insemination and embryo transfer in ewes.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Estradiol-17-beta effects on lipid metabolism of adipose tissue in nutritionally induced lean and obese ovariectomized ewes
Article Abstract:
Nutritionally induced lean and obese ovariectomized ewes were implanted with estradiol-17-beta to determine whether elevated plasma estradiol, which simulates late gestation in ewes, interacted with body condition to affect lipid metabolism of adipose tissue. The results showed that the magnitude and timing of lipid metabolism of adipose tissues varied between the two body condition types, indicating that estradiol effects on lipid metabolism also depend on body condition.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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