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What causes endometriosis?

Endometriosis

The exact reason for endometriosis is unknown, but several theories exist. Retrograde menstruation, in which menstrual blood flows back into the pelvis instead of out of the body, is one possible cause. Hormonal imbalances, immune system dysfunction, and genetic factors may also contribute to the development of endometriosis.

Medically Reviewed Content
Medically Reviewed
By Ferty9 Medical Board, at Ferty9 Fertility Center | Last Reviewed: Aug 22, 2025
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