Ovary: colpotomy

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  • Ovaries are removed from mares for two reasons - pathologic changes or management practices.
  • A number of different approaches and techniques are available to the surgeon.
  • Ovariectomy is associated with a higher frequency of peri-operative complications than other elective surgical procedures.


  • Removal of ovaries bilaterally from mares not intended for breeding, ie management reasons    .
  • Removal of ovarian neoplasia    , eg teratoma , adenoma, adenocarcinoma granulosa cell tumor    , lymphosarcoma .


  • Treatment of choice for removal of ovarian neoplasia.
  • Standing sedation can be used for ovariectomy via colpotomy.


  • High frequency of peri-operative complications - some of which can be life-threatening.
  • Technically difficult to exteriorise ovary and ligate it.


Materials required

Minimum equipment

  • Standard surgical kit.
  • Ecraseur.


Via Colpotomy
  • Standing sedation    : 10-15 min.
  • Epidural anesthesia    : 10-15 min.
  • Aseptic preparation: 10 min.



  • Associated with high incidence of peri-operative complications:
    • Post-operative myopathy/neuropathy    .
    • Wound infections.
    • Wound dehiscence.
    • Eventration.
    • Vaginal adhesions.
    • Peritonitis    .
    • Post-operative pain.
    • Hemorrhage.


  • Depends upon primary reason for surgery.
  • Guarded for behavioral reasons - although normal oestrus cycles are prevented, this may not alleviate the abnormal behavior.
  • Guarded for ovarian granulosa theca cell tumors    .
  • Unilateral resection: mares return to estrus in mean of 8.5 months (usually must go through the winter cycle).
  • Once the normal cycle has started, fertility appears to be unaffected.

Reasons for treatment failure

  • Failure to remove all ovarian tissue.
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