The American journal of the medical sciences (1827)
[Thorofare, N.J., etc.] Charles B. Slack [etc.] · leaf 324
the obstetric canal. First. As to the planes of the pelvis. There can be no doubt that the planes through which the child's head descends till the top of the head reaches the floor of the pelvis, are all parallel to eaeh other as low down as the top of the arch of the pubis, and of course at right… … the pelvis through which the child descends, I believe, perpendicularly, during the latter part of labour. Lines similarly converging to the pubis, drawn from the posterior wall of the distended vagina even to the freenum vaginas, would represent the successive planes of this canal, through which…
Medicine
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
