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Sustained but not repeated acute elevation of cortisol impaired the luteinizing hormone surge, estrus, and ovulation in gilts

Turner, A.I., Hemsworth, P.H., Canny, B.J. and Tilbrook, A.J. 1999, Sustained but not repeated acute elevation of cortisol impaired the luteinizing hormone surge, estrus, and ovulation in gilts, Biology of reproduction, vol. 61, no. 3, pp. 614-620, doi: 10.1095/​biolreprod61.3.614.

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Title Sustained but not repeated acute elevation of cortisol impaired the luteinizing hormone surge, estrus, and ovulation in gilts
Author(s) Turner, A.I.ORCID iD for Turner, A.I. orcid.org/0000-0002-0682-2860
Hemsworth, P.H.
Canny, B.J.
Tilbrook, A.J.
Journal name Biology of reproduction
Volume number 61
Issue number 3
Start page 614
End page 620
Total pages 7
Publisher Society for the Study of Reproduction
Place of publication New York, N.Y.
Publication date 1999-09-01
ISSN 0006-3363
Keyword(s) Science & Technology
Life Sciences & Biomedicine
Reproductive Biology
FOLLICULAR PHASE
CIRCULATING LH
ACUTE STRESS
PIGS
SECRETION
ACTH
SOW
CORTICOSTEROIDS
PROLACTIN
Summary We tested the hypothesis that sustained and repeated acute elevation of cortisol would impair the LH surge, estrus, and ovulation in gilts. Cortisol was injected intramuscularly, to achieve a sustained elevation of plasma concentrations of cortisol, or intravenously, to achieve an acute elevation of plasma concentrations of cortisol. Control gilts received i.m. injections of oil and i.v. injections of saline. These treatments were administered to gilts (n = 6 per treatment) at 12-h intervals from Days 7 to 11 of the estrous cycle until after estrus ceased or until Day 27 or 28 of the estrous cycle, whichever came first. The repeated acute elevation of cortisol had no effect on the LH surge, estrus, or ovulation. In contrast, when the elevation of cortisol was sustained, the LH surge, estrus, and ovulation were inhibited. We conclude that cortisol is capable of direct actions to impair reproductive processes in female pigs but that plasma concentrations of cortisol need to be elevated for a substantial period for this to occur.
Language eng
DOI 10.1095/​biolreprod61.3.614
Field of Research 111603 Systems Physiology
110306 Endocrinology
070206 Animal Reproduction
11 Medical And Health Sciences
06 Biological Sciences
Socio Economic Objective 830308 Pigs
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©1999, Society for the Study of Reproduction
Persistent URL http://hdl.handle.net/10536/DRO/DU:30080837

Document type: Journal Article
Collection: Centre for Physical Activity and Nutrition Research
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