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  4. SFT - Theriogenology Annual Conference - Portland, 2014
  5. Follicular Dynamics Following Cloprostenol Administration in the Diestrous Mare
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Follicular Dynamics Following Cloprostenol Administration in the Diestrous Mare

Author(s):
Ferris R.A.,
Burden C.A. and
McCue P.
In: SFT - Theriogenology Annual Conference - Portland, 2014 by Society for Theriogenology
Updated:
AUG 09, 2014
Languages:
  • EN
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    Prostaglandin F2α (PGF) treatment is routinely used in the reproductive management of mares to induce luteolysis and a subsequent return to estrus. The objectives of this study were to 1) evaluate the interval from administration of a single, 250 µg intramuscular dose of cloprostenol sodium (Estrumate® Schering-Plough Animal Health Corp., Summit, NJ) to ovulation in the mare with considerations of follicle size, mare age, and season at time of administration; 2) evaluate the fate of large follicle (≥35 mm) at the time of PGF administration; and 3) determine incidence of hemorrhagic anovulatory follicle (HAF) formation following PGF administration in mid-diestrus to 275 American Quarter Horse mares. A total of 529 estrous cycles were evaluated. Continuous data were compared using a one way ANOVA (analysis of variance) with post hoc analysis by student’s t-test. Significance was set at p < 0.05. Categories were analyzed by Chi Square analysis. Data are presented as mean ± S.E.M. The average interval to ovulation following cloprostenol administration was 8.4 ± 2.5 days. The interval from PGF administration to subsequent spontaneous ovulation was inversely proportional to the diameter of the largest follicle at the time of treatment, if the follicle went on to ovulate (Table). In some mares, the largest diestrous follicle regressed and was replaced by another follicle on either the ipsilateral or contralateral ovary.  […]

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    How to reference this publication (Harvard system)?

    Ferris, R., Burden, C. A. and McCue, P. (2014) “Follicular Dynamics Following Cloprostenol Administration in the Diestrous Mare”, SFT - Theriogenology Annual Conference - Portland, 2014. Available at: https://www.ivis.org/library/sft/sft-theriogenology-annual-conference-portland-2014/follicular-dynamics-following-cloprostenol-administration-diestrous-mare (Accessed: 31 May 2023).

    Affiliation of the authors at the time of publication

    Department of Clinical Sciences, Colorado State University, Fort Collins, CO

    Author(s)

    • R. Ferris

      Ferris R.A.

      DVM, MS, Diplomate ACT
      Summit Equine,
      Read more about this author
    • Burden C.A.

      DVM
      Department of Clinical Sciences, School of Veterinary Medicine, Colorado State University
      Read more about this author
    • Patrick McCue

      McCue P.

      Professor
      BA DVM PhD Dipl ACT
      Equine Reproduction Laboratory, College of Vet Medicine and Biomedical Sciences, Colorado State University
      Read more about this author

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    © All text and images in this publication are copyright protected and cannot be reproduced or copied in any way.
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    Society for Theriogenology

    The Society for Theriogenology is an organization of veterinarians dedicated to animal reproduction, whose mission is to promote standards of excellence in reproductive medicine, to provide outreach and education to veterinarians, and to foster continual improvements in theriogenology.

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