Table 1.

The scanning protocols used for both rTVUS and eTVUS.

Protocol inclusion	rTVUS	eTVUS
Uterus + volume measurement	✓	✓
Cervix	✓	✓
Colour Doppler assessment of cervix	✓	✓
Endometrium + thickness measurement	✓	✓
Colour Doppler assessment of endometrium	✓	✓
3D volume of uterine cavity	✓	✓
Ovaries +volume measurement	✓	✓
Ovarian mobility	✓	✓
Ovarian site‐specific tenderness	✓	✓
Uterine sliding sign	✓	✓
Pouch of Douglas	Assessed for fluid only	Assessed for fluid and nodules of endometriosis
Vaginal wall/posterior vaginal fornix	✗	✓
Uterosacral ligaments/torus uterinus + measurement	✗	✓
Rectosigmoid colon	✗	✓
Rectovaginal septum	✗	✓
Bladder	✗	✓
Ureters	✗	✓
Vesicouterine space	✗	✓
Bladder mobility	✗	✓

rTVUS, routine transvaginal ultrasound; eTVUS, endometriosis transvaginal ultrasound.