1. Staging of endometriosis, rASRM classification.

Location of endometriosis	Extent	Depth
		< 1 cm	1‐3 cm	> 3 cm
Peritoneum	Superficial	1	2	4
	Deep	2	4	6
Ovary	R Superficial	1	2	4
	Deep	4	16	20
	L Superficial	1	2	4
	Deep	4	16	20
	Posterior cul‐de‐sac obliteration	Partial	Complete
		4	40
	Adhesions	< 1/3 Enclosure	1/3‐2/3 Enclosure	> 2/3 Enclosure
Ovary	R Filmy	1	2	4
	Dense	4	8	16
	L Filmy	1	2	4
	Dense	4	8	16
Tube	R Filmy	1	2	4
	Dense	4a	8a	16
	L Filmy	1	2	4
	Dense	4a	8a	16

Stage ·1 (Minimal) ‐ score 1‐5; Stage II (Mild) ‐ score 6‐15; Stage III (Moderate) ‐ score 16‐40; Stage IV (Severe) ‐ score >40

^aIf the fimbriated end of the fallopian tube is completely enclosed, change the point assignment to 16 (ASRM 1997)