The XX Factor: What women really think.

"We're All Intersex"

We learned today that Rita Wilson is prepping an HBO series based on Middlesex, Jeffrey Eugenides' Pulitzer-winner about a girl named Callie who grows up to become a man named Cal. In a bit of fortuitous timing, Salon has posted an interview with professor Gerald N. Callahan, author of Between XX and XY, a new book about intersex people.

Intersex people are born neither male nor female; the descriptor is "an umbrella term that includes people with a tremendous number of genetic conditions, from those born with an extra X chromosome to those with overdeveloped adrenal glands."

There are lots of interesting nuggets here—for example, Callahan's description of biological sex as a spectrum, not a binary system. (Hence the piece's title, "We're all intersex.") That's a concept that many of us are comfortable with vis-a-vis gender identity, but applying that framework ... (Read more at DoubleX.com.)