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What is endometriosis?

Endometriosis is a condition where tissue, similar to the lining of the uterus, grows in other parts of your body. The tissue that grows outside your uterus bleeds around the time you have your period.

Endometriosis is associated with pain and inflammation.

In Australia, one in 7 women have been diagnosed with endometriosis.

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Most endometriosis grows in the pelvic area. For example:

  • the tissue that lines the abdominal wall and pelvis
  • cysts on the ovaries.

More rarely, endometriosis can be found outside the pelvic area.

Diagram of a uterus affected by endometriosis
Diagram of a uterus affected by endometriosis

This con­tent has been reviewed by a group of med­ical sub­ject mat­ter experts, in accor­dance with Jean Hailes pol­i­cy.

1
Endometriosis, How common is endometriosis? Australian Institute of Health and Welfare. Published December 14, 2023. Accessed February 13, 2024.
Last updated: 
02 October 2025
 | 
Last reviewed: 
31 March 2025

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