For more info, see:Classification/staging systems for endometriosis: the state of the arthttps://gremjournal.com/wp-content/uploads/2020/02/03_Petraglia.pdf Endometriosis classification, staging and reporting systems: a review on the road to a universally accepted endometriosis classificationhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC8530712/ Endometriosis Stages: Understanding the Different Stages of Endometriosishttps://www.endofound.org/stages-of-endometriosis