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Interovulatory intervals in mares receiving deslorelin implants in Ireland (2009 to 2010)
Date Issued
2012-04
Date Available
2013-10-02T08:21:01Z
Abstract
Deslorelin acetate implants, recently licensed in Ireland and the UK for ovulation induction in mares, have been associated with prolonged interovulatory intervals in USA studies, leading to the practice of removing implants postovulation. Trial data in Australia indicate a less pronounced effect on interovulatory intervals, suggesting possible geographical variation. Objectives of the current study were to assess the effect of deslorelin implants, with and without removal on oestrous cycle length in Irish- and UK-based Thoroughbred broodmares. Data were collected retrospectively from 88 oestrous cycles. A statistically significant difference (P=0.02) was found between interovulatory intervals in mares in which the deslorelin implant was not removed, compared with administration and removal of the implant or the use of human chorionic gonadotrophin. The results suggest that implant removal when possible is advisable. The delay in subsequent ovulations was less marked than that reported in some studies from the USA. This information is useful in deciding when to schedule subsequent breeding for mares which received a deslorelin implant during the previous oestrous period and provides evidence to counter-concerns that mares treated with deslorelin implants may experience a long delay in return to oestrus if the implant is not removed.
Type of Material
Journal Article
Publisher
British Veterinary Association
Journal
Veterinary Record
Volume
170
Issue
21
Start Page
541
Copyright (Published Version)
2012 British Veterinary Association
Keywords
Language
English
Status of Item
Peer reviewed
This item is made available under a Creative Commons License
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Owning collection
Scopus© citations
4
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