It only took her 25 years fighting with the medical community....
http://www.nytimes.com/2002/07/04/world/alice-stewart-95-linked-x-rays-to-diseases.html
Dr. Stewart, then a member of the social medicine department at Oxford, was surprised to discover when she conducted a survey that children of mothers who had had this X-ray were almost twice as likely to have cancer as other children.
Her finding that there was danger in receiving even such a low dose of radiation was met with outrage by doctors and the nuclear industry, and Dr. Stewart had difficulties obtaining financing for other studies. But by the mid-1970's, other scientists had duplicated her findings on prenatal X-rays, and the practice ended.
http://www.nytimes.com/2002/07/04/world/alice-stewart-95-linked-x-rays-to-diseases.html
Dr. Stewart, then a member of the social medicine department at Oxford, was surprised to discover when she conducted a survey that children of mothers who had had this X-ray were almost twice as likely to have cancer as other children.
Her finding that there was danger in receiving even such a low dose of radiation was met with outrage by doctors and the nuclear industry, and Dr. Stewart had difficulties obtaining financing for other studies. But by the mid-1970's, other scientists had duplicated her findings on prenatal X-rays, and the practice ended.