MAYO CLINIC ROCHESTER, Minn. — Surgical removal of both ovaries is associated with an increased risk of Parkinson’s disease and parkinsonism in women younger than 43, Mayo Clinic researchers report in JAMA Network Open. Using health record data from the Rochester Epidemiology Project, the study included 2,750 women who had undergone surgery to remove both ovaries, a procedure called bilateral oophorectomy, and...