这个俺刚才也看到英文的文章，美国麻醉师协会的，应该比较权威

https://www.asahq.org/about-asa/newsroom/news-releases/2014/06/epidural-myth

其中的第三个Myth

“There is no credible evidence that an epidural slows down labor，... ... ，In fact, there is evidence that epidurals can speed the first stage of labor for some women.”

 

不过各自为各自利益，也可能是麻醉师们想什么都上麻药，创收。