Visualizing Sex as a Spectrum - Scientific American Blog Network
The search for solid data on transgender and intersex populations proved challenging, and was confounded by a variety of factors. For example, surveys often lump transgender in with gay, lesbian, and bisexual identities. And DSDs, in addition to being variously defined by different entities, sometimes go undetected or emerge unexpectedly, either during sexual development or later in life.
The project abruptly transformed into an exercise in visualizing complexity. First, it seemed imperative to define a few terms. Sex, gender, and sexuality are all distinct from one another (although they are often related), and each exists on its own spectrum. Moreover, sex cannot be depicted as a simple, one-dimensional scale.