So here are some articles that breakdown some unknown facts:
This article: http://www.obgynhistory.com/ shows when c/s started. 1890.
This article: http://www.cdc.gov/reproductivehealth/MaternalInfantHealth/PMSS.html was the earliest I could find on how our maternal mortality is steadily getting worse. This chart starts from 1987, I will continue to try to find earlier.
This article: http://www.midwiferytoday.com/articles/timeline.asp shows around the time we started to medicalized childbirth 1856.
Then we have this bit of info: The death rate for women giving birth plummeted in the 20th century. The historical level of maternal deaths is probably around 1 in 100 births. Mortality rates reached very high levels in maternity institutions in the 1800s, sometimes climbing to 40 percent of birthgiving women (see Historical mortality rates of puerperal fever). At the beginning of the 1900s, maternal death rates were around 1 in 100 for live births. The number in 2005 in the United States was 11 in 100,000, a decline by two orders of magnitude, although that figure has begun to rise in recent years, having nearly tripled over the decade up to 2010 in California. A maternal mortality rate for the U.S. of 24 per 100,000 was reported for 2008. This change might not actually reflect an increase, due to a change in reporting methods by the CDC in 1999.
and this final article:http://www.webmd.com/baby/news/20130627/c-sections-in-us-stable-after-12-year-rise-cdc shows the popularity of c/s hitting a big peak around 1996-2009. please revert back to the maternal outcomes article....FYI