The four stages
Endometriosis is classified into four stages — minimal (Stage I), mild (Stage II), moderate (Stage III), and severe (Stage IV) — based on the location, extent, and depth of the endometriotic tissue, as well as the presence of adhesions.
The staging is determined during laparoscopy. It describes the physical extent of the disease, not how much pain you're experiencing or your likelihood of fertility issues.
Why stage doesn't always match symptoms
One of the most confusing aspects of endometriosis is that the stage doesn't always correlate with symptoms. A woman with Stage I endometriosis may experience severe pain, while a woman with Stage IV may have minimal symptoms.
This is why endometriosis should be managed based on your individual symptoms and goals — not just the stage assigned during surgery. Pain is real regardless of what the surgeon sees.
What this means for your care
Your GP and gynaecologist will consider the stage alongside your symptoms, fertility goals, and quality of life when planning your treatment. The goal is always to manage your symptoms and protect your fertility — regardless of what stage you've been given.
If you've been told your endometriosis is 'mild' but your pain is severe, you deserve to have that taken seriously. Don't let the stage undermine your experience.
Related condition
Endometriosis →References & sources
This content is general information and not a substitute for individual medical advice. Please consult a GP for your personal situation.
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