1. Deep endometriosis conundrum: evidence in favor of a peritoneal origin
Paolo Vercellini, M.D., Giorgio Aimi, M.D., Stefania Panazza, M.D., Sarah Vicentini, M.D., Anna Pisacreta, M.D., Pier Giorgio Crosignani, M.D. 
Fertility and Sterility 
Volume 73, Issue 5, Pages (May 2000)
DOI: /S (00)

2. FIGURE 1
Measurement of the depth of the pouch of Douglas (A) at laparoscopy. B, bladder; R, rectum; RVP, rectovaginal pouch; RVS, rectovaginal septum; U, uterus; USL, uterosacral ligament; V, vagina; VUP, vesicouterine pouch.
Vercellini. Deep endometriosis conundrum. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (00) )