Background: Despite indications of high cesarean section rates in vari
ous parts of Latin America, relatively few comprehensive studies of na
tional birth intervention trends have been conducted in that continent
. Recent national statistics suggest that Chile may now have the highe
st reported cesarean section rate in the world. This paper examines ce
sarean birth trends in Chile with reference to changing patterns in he
alth care financing. Methods: The growth in the national cesarean birt
h rate is analyzed, with reference to regional patterns, differences a
ccording to insurance coverage, and recent shifts in the financing pat
tern of health care provision, using insurance fund data and hospital
reporting systems data for both public and private sector care from th
e mid-1980s to mid-1990s. Results: Chile had a cesarean birth rate of
37.2 percent for the 301,955 births covered by either the National Hea
lth Fund or private health insurance in 1994. This was a one-third inc
rease from the 1986 rate of 27.7 percent. The private health insurance
sector revealed consistently far higher cesarean section rates than t
he National Health Fund sector (59% vs 28.8% in 1994); intrasectoral r
ates remained fairly stable over the 8-year period. Conclusions: The o
verall increase in Chile's cesarean section rate correlates with the g
rowth in the proportion of all births whose care was privately insured
during these years (from 7.5% to 24.8%). This change may be partly ex
plained by the doubling (to 32%) of the percentage of women with a per
sonal obstetrician rather than a ''duty'' practitioner attending the b
irth of their baby.