“But a new study found that when women were given just one more hour to push, C-section rates went down by roughly half.”

http://www.huffingtonpost.com/entry/new-evidence-that-we-just-need-to-give-women-more-time-to-labor_us_56ec4f66e4b084c672203418

*This article is from 3/2016 but, still a good reminder to always ask for more time.