How sexism is hindering medical research
As recently as 1921, MS (multiple sclerosis) was erroneously considered more common in men. By the late 1940s, a more even gender split was presumed. By 1960 it was posited that women might actually be slightly more prone to the condition. With the invention of the MRI - a more objective diagnostic method - we now understand MS to be three to four times more common in women.