Use of an Intrauterine Ball in Estrus Suppression

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


The use of an intrauterine device to prevent cyclicity was described hundreds of years ago with the use of polished stones in the uteri of camels. More recently a technique was described involving placement of a sterilized 35mm glass ball (marble) into the uterus of mares in an attempt to suppress behavioral estrus. The proposed mechanism of action is contact of the intrauterine device with the endometrium, resulting in altered prostaglandin secretion and subsequent prolongation of luteal function. The chapter discusses the step by step procedure for intrauterine ball (IBU) placement and removal. It also discusses necessary conditions for estrus suppression.

Original languageEnglish
Title of host publicationEquine Reproductive Procedures
Number of pages3
ISBN (Electronic)9781118904398
ISBN (Print)9780470960394
StatePublished - Aug 25 2014


  • Estrus suppression
  • Intrauterine ball (IBU)
  • Mares


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