He says we've ta'en a lower form, and calls it "retroversion."
If retroversion or retroflexion be present, then the posterior lip should be fixed.
There are three kinds of displacements: anteversion, retroversion, and prolapsus.
Retroversion:—Place the patient with face downward on bed or mat and with a small pillow under the lower part of the abdomen.
Exercises for anteversion ...