US is 14 per 100,000 and UK is 9 in 2015. America seems to be at the bottom of the western world in the list after glancing at it. Here’s a link:
https://www.cia.gov/library/publications/the-world-factbook/rankorder/2223rank.html
It’s not a large number more, but of course any death that could have been prevented is tragic. So, the percentage sounds huge, I did the math, 55% more women die in the US than in the UK per 100,000.
It’s a mixture of things.
Part of it has to do with access to health care during pregnancy.
Also, overall health in America, we have a lot of overweight women, and diabetes, and other health problems even before getting pregnant.
Possibly, I don’t know this for sure, we have more older women getting pregnant and giving birth.
Black women die much more often than white across all income levels in the US, and I don’t think they are completely sure why.
I remember reading there aren’t good protocols for the emergencies that kill women most in America, so if your emergency happens and the right specialist isn’t around, your likely to die.
I wonder if it might also have to do with distance to the hospital. America is a big wide open country in many areas. That last one is a complete guess on my part also. A friend of mine who is a doctor, his wife, who is a doctor, started hemorrhaging during her morning rounds in the hospital. She would have died if she hadn’t already been at the hospital.