Article Summary

Twenty years ago, physicians were known to tell women that the reason they had a caesarean was that the child’s head was just too big for the size of the pelvis. The trouble began when these same women would stay at home for their next child’s birth and give birth to a bigger baby through that same pelvis. This is still happening today.

http://www.bellybelly.com.au/articles/birth/pelvises-i-have-known-and-loved

Thanks for the link. It's a good read. Let me add this from Thinking Woman's Guide to a Better Birth: The cesarean rate for babies weighing 8 lbs 13 oz or more (4000 g) was 3% in 1958 in the U.K. Roughly half of all babies in the U.S. in this weight range are delivered by cesarean surgery today, but, obviously, this says something about obstetricians, not women's pelvises.

-- Henci