Length of melatonin exposure and onset of ovarian activity in anoestrous ewes
Adult anoestrous ewes (N = 30) were given intravaginal Silastic implants containing melatonin or empty implants (N = 7) during mid-anoestrus (4 July). Implants were removed 16 days later (Group 1), 36 days later (Group 2) or 93 days later (Group 3). Blood samples were taken twice weekly for progeste...
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Published in | Journal of reproduction & fertility Vol. 80; no. 1; pp. 343 - 347 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
England
01.05.1987
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Subjects | |
Online Access | Get full text |
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Summary: | Adult anoestrous ewes (N = 30) were given intravaginal Silastic implants containing melatonin or empty implants (N = 7) during mid-anoestrus (4 July). Implants were removed 16 days later (Group 1), 36 days later (Group 2) or 93 days later (Group 3). Blood samples were taken twice weekly for progesterone assay to monitor onset of ovarian activity. The percentage of ewes in each group showing early onset of ovarian cyclicity was significantly correlated with length of exposure to melatonin. |
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ISSN: | 0022-4251 1470-1626 1741-7899 |
DOI: | 10.1530/jrf.0.0800343 |