Stages of Endometriosis

Stage

Classification

Description

I

Minimal

A few superficial implants

II

Mild

More and slightly deeper implants

III

Moderate

Many deep implants, small endometriomas on one or both ovaries, and some filmy adhesions

IV

Severe

Many deep implants, large endometriomas on one or both ovaries, and many dense adhesions, sometimes with the rectum adhering to the back of the uterus

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