According to a study in Stroke, many U.S. women don’t know most of the warning signs of stroke. Of the 1,205 women in the telephone survey, 51% identified sudden weakness or numbness on one side of the face, arms or legs as a warning sign of a stroke and 41% identified difficulty speaking or garbled speak. But less than a fourth identified other signs of stroke, including sudden severe headache (23%), unexplained dizziness (20%), and sudden vision loss (18%). Read study highlights.