The association between the endometrial biopsy grade and selected epidemiological and reproductive variables in a population of subfertile mares
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Date
Authors
De Witt, Anika A.
Fosgate, Geoffrey Theodore
Schulman, M.L. (Martin)
Journal Title
Journal ISSN
Volume Title
Publisher
Wiley
Abstract
BACKGROUND : Endometrosis, a multifactorial disease, is an important cause of subfertility in the mare, and its management is reliant on histological classification.
OBJECTIVES : This study aimed to determine the association between increased endometrial biopsy grade with first a mare's breed specifically either Thoroughbred or non-Thoroughbred, age and barren status and second, a clinical history indicating one or more of acute endometritis, positive bacterial culture, previous dystocia and uterine fluid retention.
STUDY DESIGN : Retrospective case series.
METHODS : This retrospective study used historical reproductive data (2000–2015) from a population of 41 subfertile mares of various breeds, but mostly Thoroughbreds (30/41; 73%). Biopsies were interpreted by a single, experienced evaluator using the Kenney–Doig classification (1986).
RESULTS : Endometrial biopsy grade was positively correlated with age (ρ = 0.606; p = 0.001) but not associated with other evaluated variables (p > 0.05).
MAIN LIMITATIONS : Use of a small, non-randomly selected subfertile mare population.
CONCLUSIONS : Mare age was an important predictor of her reproductive performance, and performing an endometrial biopsy is therefore indicated in older mares.
Description
APPENDIX 1: Biopsy report of mare 1 from an Arabian farm in Saudi Arabia submitted in 2009 and categorised as biopsy Grade I.
APPENDIX 2: Biopsy report of mare 14 submitted from a South African Thoroughbred farm in 2013 and categorized as biopsy Grade IIA.
APPENDIX 3: Biopsy report of mare 3 submitted from a Saudi Arabian Thoroughbred farm in 2014 and categorized as biopsy Grade IIB
APPENDIX 4: Biopsy report of mare 4 submitted by a South African referral veterinarian in 2002 and categorized as biopsy Grade IIB.
APPENDIX 5: Biopsy report of mare 12 submitted from a South African American Saddlebred horse farm in 2012 and categorized as biopsy Grade III.
APPENDIX 2: Biopsy report of mare 14 submitted from a South African Thoroughbred farm in 2013 and categorized as biopsy Grade IIA.
APPENDIX 3: Biopsy report of mare 3 submitted from a Saudi Arabian Thoroughbred farm in 2014 and categorized as biopsy Grade IIB
APPENDIX 4: Biopsy report of mare 4 submitted by a South African referral veterinarian in 2002 and categorized as biopsy Grade IIB.
APPENDIX 5: Biopsy report of mare 12 submitted from a South African American Saddlebred horse farm in 2012 and categorized as biopsy Grade III.
Keywords
Biopsy, Endometrosis, Horse (Equus caballus), Mare, Reproductive performance
Sustainable Development Goals
Citation
De Witt, A.A., Fosgate, G.T. & Schulman, M.L. (2023) The association between the endometrial biopsy grade and selected epidemiological and reproductive variables in a population of subfertile mares. Equine Veterinary Education, 35, e421–e428. Available from: https://doi.org/10.1111/eve.13722.