Endometriosis occurs when the tissue that lines the inside of the uterus begins to grow in places it shouldn’t, which can cause debilitating pain and infertility. Around 11% of women have endometriosis, although many remain undiagnosed.

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7 Endometriosis Symptoms You Should Never Ignore

Doctors often brush off endometriosis symptoms as something less severe, but the condition affects up to 10% of women of childbearing age.

More Endometriosis

There Are 4 Stages of Endometriosis. Here's What Each One Means

Experts use stages to classify endometriosis by severity, but the stage doesn't always correspond to a woman's pain and discomfort levels.

This Woman Almost Died After Endometriosis Surgery—and it Completely Changed Her Fitness Goals

A routine surgery gone wrong inspired this fitness Instagrammer to embrace her shape.