Researchers at the University of Michigan and Wayne State University examined the medical histories of more than 3,400 women who received hysterectomies at 52 hospitals across Michigan in 2013 and found that nearly 1 in 5 of them may not have been necessary.

http://www.slate.com/blogs/xx_factor/2015/01/08/unnecessary_hysterectomies_alternative_treatments_are_recommended_for_fibroids.html