- news, features, articles and disease information for the swine industry

ThePigSite Quick Disease Guide

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Cystic Ovaries

This is a not uncommon condition particularly in old sows. Large cysts develop in the ovaries which often, but not always produce high levels of oestrogen.


Piglets, Weaners & Growers
  • N/A


  • Abnormal heat.
  • Not accept the boar at mating.
  • Continually on heat.
  • Infertility.
  • Repeat matings.
  • Pigs show pain / discomfort.
  • May grind teeth.

Causes / contributing factors

  • Age.
  • Mycotoxins.
  • Breeding.
  • Hormonal malfunctions.
  • Mouldy bedding or food.
  • Badly stored grains.
  • Poor feed bin hygiene.


This is usually made on clinical grounds and normally only involves individual animals. Carry out a post mortem examination of the ovaries.

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