But the debate is far from over.
The report used data from the Women's Health Initiative Study. Researchers analyzed more than 25,000 post menopausal women. Those who had their ovaries removed had lower risk of ovarian cancer and no greater risk of heart disease, hip fractures, or other types of cancer.
These results in the Archives of Internal Medicine contradict those of the only other large study of its type.
Researchers says, even with this new study, there is no clear answer.
Women are encouraged to talk with their doctor.