In the “just because it comes up often enough in discussions” category. I have found a link by Cecil Adams of the Chicago Reader that exposes the popular abortion rights myth that “10,000 American women a year died from illegal abortions before Roe v. Wade.”
My favorite quote from the article comes from one of the primary author of this urban legend Bernard Nathanson, originally with NARAL, when he says, “I confess that I knew the figures were totally false, and I suppose the others did too if they stopped to think of it. But in the ‘morality’ of our revolution, it was a useful figure, widely accepted, so why go out of our way to correct it with honest statistics?” Nathanson has sense become a Pro-Life advocate.