The similar specifiers attracted to men, attracted to women, attracted to both or attracted to neither were used in the DSM-IV.Many transsexual people choose the language of how they refer to their sexual orientation based on their gender identity, not their birth assigned sex. Surgical status
Several terms are in common use, especially within the community itself relating to the surgical or operative status of someone who is transsexual, depending on whether they have already had sex reassignment surgery (SRS), have not had SRS but still intend to, or do not intend to have SRS. They are, post-op, pre-op, and non-op, respectively. Pre-operative
A pre-operative transsexual person, or simply pre-op for short, is someone who intends to have SRS at some point, but has not yet had it. Post-operative
A post-operative transsexual person, or post-op for short, is someone who has had SRS. Non-operative
A non-operative transsexual person, or non-op, is someone who has not had SRS, and does not intend to have it in the future. There can be various reasons for this, from personal to financial. Having SRS is not a requirement of being transsexual. Evolutionary biologist and trans woman Julia Serano criticizes the societal preoccupation with SRS as phallocentric, objectifying of transsexuals, and an invasion of privacy. : 229–231

Historical understanding
Transgender people are known to have existed since ancient times. A wide range of societies had traditional third gender roles, or otherwise accepted trans people in some form.
However, a precise history is difficult because the modern concept of being transgender, and gender in general, did not develop until the mid-1900s. Historical understandings are thus inherently filtered through modern principles, and were largely viewed through a medical lens until the late 1900s.Ancient Greek Hippocrates (interpreting the writing of Herodotus) discusses transgender individuals briefly. He describes the "disease of the Scythians" (regarding the Enaree), which he attributes to impotency due to riding on a horse without stirrups. Hippocrates reference was well discussed by medical writings of the 1500s–1700s. Pierre Petit writing in 1596 viewed the "Scythian disease" as natural variation, but by the 1700s writers viewed it as a "melancholy", or "hysterical" psychiatric disease. By the early 1800s, being transgender separate from Hippocrates idea of it was claimed to be widely known, but remained poorly documented. Both MtF and FtM individuals were cited in European insane asylums of the early 1800s. The most complete account of the time came from the life of the Chevalier dÉon (1728–1810). As cross-dressing became more widespread in the late 1800s, discussion of transgender people increased greatly and writers attempted to explain the origins of being transgender. Much study came out of Germany, and was exported to other Western audiences. Cross-dressing was seen in a pragmatic light until the late 1800s; it had previously served a satirical or disguising purpose.