The rose in spring
The only reason to do a C-section is if there is a complication in the birthing process. Just be aware that there are other things. Obesity has climbed up as well as chemicals in our food. Poor health in the population can easily account for that.
Because there is totally no such thing as an elective C-section, and doctors totally do not offer C-sections as solutions to minor problems. (Bonus cynicism: And internal surgery procedures totally do not make more money for physicians and hospitals.)
I'm not sure what you're saying with obesity, unless you're trying to use the increase in obesity as an indicator for the increase in C-sections.
confused Unless what you mean is that overall health hasn't improved since the advent of the modern medical model, which therefore means it's labor on one's back and invasive procedures which have lowered the infant mortality rate?
Infant mortality is most often caused by disease or accident post-delivery, or by a congenital disorder which was present before labor. Medical delivery procedures have no effect on these issues, except in the rare case where an infant is exposed to a pathogen during the delivery procedure.
Recall also that infant mortality is measured by survival to age 1. Vaccines are the big flag for this one, not insane birth procedures.
The presence of nurse midwives is strongly correlated to a decrease in IMR.