symphysiotomy

[sĭm-fĭz′ē-ŏtə-mē, sĭm′fə-zē-]
n.
  1. Surgical division of the pubic symphysis, especially to permit the passage of a fetus during delivery.pelviotomy synchondrotomy
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

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Historical Examples of symphysiotomy