One in 10 women diagnosed with the condition
March marks Endometriosis Awareness Month and the founders of a support group on Facebook say they'd like to see more done for women who are suffering with the condition.
The aim of today's event is to share stories and gather information about what sort of help those with endometriosis would like from the healthcare sector.
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Participants are encouraged to wear yellow and carry along 10 items to represent the statistic that one in every 10 women are affected by the condition.
Karen Bell and Sharon Lunt are the organisers:
The event starts at 2.30pm at Tynwald Hill
You can find out more about the condition by listening to this Newscast.