Endometritis: Managing Persistent Post-Breeding Endometritis

Igor F. Canisso, Jamie Stewart, Marco A. Coutinho da Silva

Research output: Contribution to journalReview articlepeer-review


Endometritis was rated as the third most common medical problem encountered in adult horses in North America. It is the leading cause of subfertility in broodmares and is a major contributor to economic loss in the horse breeding industry, with pregnancy rates reported to be as low as 21% in mares with severe endometritis. Endometritis may be categorized as: endometrosis (chronic degenerative endometritis), acute, chronic, active, dormant, subclinical, clinical, and persistent post-breeding. These classifications are not mutually exclusive, and mares may change categories within breeding seasons or estrous cycles or may fit in multiple classifications. This chapter will focus on discussing etiology and management strategies for mares affected by persistent post-breeding endometritis. Overall, these mares are considered subfertile but acceptable pregnancy and foaling rates can be achieved with appropriate breeding management.

Original languageEnglish (US)
Pages (from-to)465-480
Number of pages16
JournalVeterinary Clinics of North America - Equine Practice
Issue number3
StatePublished - Dec 1 2016


  • Endometritis
  • Intrauterine fluid
  • Mare
  • Post-Breeding endometritis
  • Uterine lavage

ASJC Scopus subject areas

  • Equine


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