(Chapter 29) Footnote 62:

On this passage see Siraisi 1994 pp.77ff. This belief was again attacked by Louis Joubert, Erreurs populaires au fait de la medicine et regime de santé, Bordeaux 1578, iv.1, pp. 331-9, tr. G.D. de Rocher as Popular Errors (Tuscaloosa: Univ. of Alabama Press, 1989), p. 167f. The belief that the pubic symphysis separated in childbirth originated in a cryptic phrase in Avicenna, but the edge of Vesalius’ polemic is probably aimed at Berengario’s 1522 Isagogae breves: “Both before and behind, these two [pelvic] bones by the will of God are opened in childbirths” (tr. Lind 1959, p. 174). See Danielle Jacquart in Micrologus 11 (1993), pp. 81-98.