There's a lot of cirumstantial evidence supporting it, like her sterility, facial features, and plastic surguries. The way I heard it, she wasn't a hermaphrodite, but had one of those extra sex chromosome issues. Since downs syndrome is the same sort of issue, I always thought it was why she adopted downs syndrome kids and did so much for related support groups.
(The former is a case of mosaicism, the latter is too many copies in all cells. If that doesn't make sense to you, check out the URL at the bottom)
Which is a major bummer, since had the major hots for her when I was a teenager- 20 years later, I still do, even though I know she's fairly fucked up physiologically. It helps that she also has the sort of personality and sense of humor I like in women, at least in public.
http://www.med.uc.edu/embryology/cha...aic.htm&e=9797