(Chapter 29) Footnote 61:

For childbirth in an erect position on a “midwife’s stool,” see for example Soranus Gynecology 2.3.1ff., tr. O. Temkin 1956 p. 71. This and the preceding sentence are omitted from the 1555 Fabrica, which continues “This (not including what has been said in its place about the coccyx) is the provision Nature has made,” etc.