Recto-uterine pouch
（重定向自Douglas Pouch）
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The recto-uterine pouch (or rectouterine excavation, rectovaginal, Ehrhardt-Cole Recess, cul-de-sac, cavum Douglasi or Pouch of Douglas) is the extension of the peritoneal cavity between the rectum and the posterior wall of the uterus in the female human body.