A transwoman (also spelled trans-woman) is a transsexual or transgender person who was naturally born or physically assigned, as male at birth, but believes that this is not an accurate or complete description of themselves and identifies as a woman.
Transwomen who feel that their gender transition is complete often prefer to be called simply "women", considering "transwoman" or "male-to-female transsexual" to be terms that should only used for persons who are still transitioning. However, even after transitioning, transwomen have biological differences from cisgender women. For example, most have XY chromosomes. However, women does not necessarily refer to biological sex, it can also refer to culturalgender role distinctions. Those who still identify as transwomen after transitioning may describe themselves as "post-op" (post-operative; as distinguished from "pre-op") transwomen. Transwomen who do not want sex reassignment surgery, are sometimes described as "non-op". Many transwomen consider genital surgery as only a small part of a complete transition and some argue that transwomen should not be defined by their surgical status. Others dislike the term "transsexual" and prefer to call themselves transgender women.
Most recent scientific studies and reports by support groups, help lines, etc. indicate that the percentage of transwomen who consider themselves lesbian, bisexual or asexual is higher than in the general female population. The details, however, differ; scientific papers usually report a higher number of heterosexual-identified transwomen than support groups report, perhaps influenced by demographic factors: what kind of people have access to support groups, as well as methodologies used for individual studies.
Australian WOMAN Network - The Australian WOMAN Network, a group which lobbies for the rights of Australian women living with transsexualism or of transsexual background.
Harry Benjamin Syndrome (HBS). This site is dedicated to enlightening people to the indicative research that suggests transsexualism may be an intersex condition. It also shows a suggested Standards of Care document.
Lynn Conway - Her goal is to "illuminate and normalize the issues of gender identity and the process of transitioning".