Homosexual transsexual (term)
Homosexual transsexual is a term that has been used by some sexologists, psychologists and psychiatrists to describe transwomen who are attracted to men, and less often transmen who are attracted to women. The terms androphilia and gynephilia are replacing those terms in active use. The concept of categorizing transsexuals by sexual orientation originated with Magnus Hirschfeld in 1923. The specific term homosexual transsexual was defined by Kurt Freund in 1973, and used as part of a two-type taxonomy by him in 1982. Even though homosexuality itself was removed from the Diagnostic and Statistical Manual of Mental Disorders, 2nd edition (DSM II) as a mental disorder diagnosis.
In the DSM III, transsexualism was to be diagnosed and the sexual orientation of a transsexual specified using the terms homosexual, heterosexual, asexual, or unspecified. This concept arose because early investigators thought the main difference between a male transvestite and a male-to-female transsexual was same-sex attraction. The term or concept has since been used in articles by Harry Benjamin, Kurt Freund, Ray Blanchard, and others. More modern alternatives recognize that gender identity, not sexuality, define a transsexual, while still differentiating between androphilic and gynephilic research subjects.
The term homosexual transsexual has been criticized from within sexology by Benjamin, Bruce Bagemihl, and John Bancroft as being confusing, as well as being insensitive to the gender identities of those whom it is meant to describe. The alternatives androphilic and gynephilic have been proposed by Milton Diamond as descriptors for sexual orientation that do not assume anything about the sex or gender identity of the person being described. Terms such as androphilia and gynephilia are used instead of, or concurrently with, homosexual, heterosexual or non-homosexual in current research such as any research which has used the "modified androphilia scale" to asses the attraction to men of a given transsexual. SJ Whang said in 2004 that the term homosexual transsexual is archaic. The term transsexuality was removed as a mental disorder from the DSM-IV. Gender identity disorder replaced transsexuality as a diagnostic term; however, attraction to males, females both or neither is still specified in the DSM IV-TR.
Most research has been conducted on male-to-female homosexual transsexuals. They are usually socio-economically disadvantaged, born later in a series of brothers, are unlikely to display cross-gender fetishism or autogynephilia, and come out at a younger age than non-homosexual transsexuals. Relatively little research has been done on gender variance in biological females, and the prevalence of female-to-male gender identity disorder (GID) is less than that of male-to-female GID.
- 1 Development of the concept
- 2 Description
- 3 MRI studies and neurological differences
- 4 See also
- 5 References
- 6 External links
Development of the concept
The term homosexual transsexual was defined by Kurt Freund in 1974, and is used by some sexologists and psychiatrists to describe transwomen who are attracted to men, though occasionally they use it to describe transmen who are attracted to women. The concept of a taxonomy based on transsexual sexuality was first proposed by physician Magnus Hirschfeld in 1922, and codified by endocrinologist Harry Benjamin in the Benjamin Scale in 1966. Which was published in the influential book "The Transsexual Phenomenon". Benjamin wrote that researchers of his day thought that attraction to men, as a woman was the factor that distinguished a transvestite from a transsexual. "The transvestite - they say - is a man, feels himself to be one, is heterosexual, and merely wants to dress as a woman. The transsexual feels himself to be a woman ("trapped in a man’s body") and is attracted to men."(Benjamin 1966).
Homosexuality was removed as a mental disorder from the DSM-II, the diagnostic manual published by the American Psychiatric Association, the most widely used diagnostic manual worldwide. Ego-dystonic homosexuality was retained as a diagnosis for those who are caused distress by their sexual orientation.
In 1980 in the DSM III, a new diagnosis was introduced, that of "302.5 Transsexualism" under "Other Psychosexual Disorders". This was an attempt to provide a diagnostic category for a gender identity disorders; the others included were "302.3 Transvestism" and "302.8 Fetishism". The diagnostic category, "transsexualism", was for gender dysphoric individuals who demonstrated at least two years of continuous interest in transforming their physical and social gender status. The subtypes were 1. asexual, 2. homosexual (same anatomic sex), 3. heterosexual (other anatomic sex) and 0. unspecified.
Physician and sexologist Kurt Freund proposed two types of cross-gender identity in 1982, based on his observation that gender identity disorder is different for homosexual males and heterosexual males. Subsequently, this term appeared in the DSM-III-R, but not in the DSM IV in which gender identity disorder replaced transsexualism. Sexologists quantitatively measure sexual orientation using psychological personality test or they rely on self reports. Blanchard and Freund used the Masculine Identity in Females (MGI), and the modified androphilia scale. Homosexual transsexuals averaged a Kinsey scale measurement of 5-6 or a 9.86±2.37 on the Modified Androphilia Scale. S.J. Whang wrote in 2004 that homosexual transsexual appeared in the DSM III-R, and that he considered it archaic (see next section).
The concept that transsexuals with homosexual and non-homosexual sexual orientations are eitologically different has a long history in this field. However the terms used have not always been agreed on. In recent years scientists working on the topic have criticized the practice of categorizing transsexuals by sexual orientation and sex at birth. In the words of Benjamin, male to female transsexuals can only be homosexual if anatomy alone is considered, and the psyche of MTF transsexuals is ignored. According to him after SRS calling a male to female transsexual homosexual is pedantic. One must bear in mind that when Benjamin was writing, transsexual implied male to female, and attracted to men. For a time in the 1980s terms which SJ Wahng describes as homosexual transsexual were in the DSM-III-R (transsexual,homosexual subtype) Tamara Shefer said that the DSM-IV and DSM-IV-TR stipulate that the sex a transsexual is attracted to be specified as "attracted to males, females, both or neither".
Others, such as biologist and linguist Bruce Bagemihl, agree with what Benjamin wrote about the use of this term. Bagemihl wrote that this terminology makes it easy to say transsexuals are really homosexual males seeking to escape from stigma. Sexologist Jim Weinrich opined that sexologist Ray Blanchard looked for information to support his theory instead of letting the evidence guide his theorizing, by using "a series of clever questionnaires and plethysmogaphic studies." Weinrich said that Blanchard asserted all female to male transsexuals were "woman loving". Leavitt and Berger criticized the term in 1990, saying that it was "both confusing and controversial among males seeking sex reassignment." Critics argue that the term "homosexual transsexual" is "heterosexist", "archaic", and demeaning because it labels people by sex assigned at birth instead of their gender identity. Benjamin, Leavitt, and Berger have all used the term in their own work. Sexologist John Bancroft also expressed regret for having used this terminology, which was standard when he used it, to refer to transsexual women. He says that he now tries to choose his words more sensitively.
Professor of anatomy and reproductive biology, Milton Diamond (1990, 2002) proposed the use of the terms androphilic and gynephilic as alternatives to homosexual and heterosexual. Diamond wrote that the terms homosexual and heterosexual are confusing as applied to transsexual persons because it is not instantly clear whether they reference the pre- or post-transition state. S.J. Wahng said in 2004 that the diagnosis homosexual transsexual is archaic and conflates homosexuality with transsexuality.
Sexological research has been done using these alternative terms by researchers such as Sandra L. Johnson (1990). In research done by Blanchard in 1985, and Leavitt they used a psychological test called the "modified androphilia scale" to asses weather a transsexual was homosexual or not.
Transsexual community reaction
According to Leavitt and Berger, "transsexuals, as a group, vehemently oppose the label and its pejorative baggage." Transwoman Andrea James has called the term "inaccurate and offensive," and transman Aaron Devor wrote, "If what we really mean to say is attracted to males, then say 'attracted to males' or androphilic... I see absolutely no reason to continue with language that people find offensive when there is perfectly serviceable, in fact better, language that is not offensive." Still other transsexuals are opposed to any and all models of diagnosis which allow gatekeeping, and seek their removal from the DSMJ. Michael Bailey and Kiira Triea, prominent critics of transsexual activists, say that Triea's transkids.us website is written by and about androphilic transwomen who are not offended by "homosexual transsexual" as a phrase. Bailey and Triea say that these transwomen fear reprisals from transgender activists if they went public.
Androphilic male to female transsexuals
Building on work by Freund, Frank Leavitt and Jack C. Berger in 1990 further categorized homosexual transsexuals by three patterns of sexual activity in how they used their penis. In their study 44% were sexually inactive, 19% avoided use of the penis during sex, and 37% derived pleasure from using the penis during sex. The groups showed varying levels of masculinity and emotional disturbance in development. Leavitt and Berger found that transsexuals in the avoidant group are different from those in the other two groups. They fit the description of the "nuclear transsexual". They had a strong cross gender identification, wanted female anatomy, had never married and little to no sexual activity with females. Of all the subgroups this group had the least comorbid psychopathology. The transsexuals in the pleasure group behaved sexually in ways that were "classically homosexual". They were more likely than those in the avoidant group to have had sexual experience with females. They also rated higher on a test of general fetishism. Other than this, transsexuals in the pleasure group were similar to the description of a "nuclear transsexual". They found that transsexuals in the inactive group had characteristics which most differed from that of the "nuclear transsexual", such as strong heterosexual orientations (as determined from psychological testing), and fetish histories. "The pattern exhibited generally conforms to that exhibited by heterosexual transsexuals." The inactive group was found to share little with the other groups of transsexuals other than a stated sexual interest in males. Leavitt and Berger also mentioned studies by Blanchard which suggest that heterosexual transsexuals will adjust their life stories to ensure that they get sex reassignment surgery.(Leavitt 1990)
In The Man Who Would Be Queen, J. Michael Bailey (2003) said that the homosexual transsexuals he studied are comfortable with prostitution, that they have a masculine sexual appetite, but lust after men. He reviewed evidence for a taxonomy that says there are two forms of transsexualism in males, one that is an extreme type of homosexuality and one that is an expression of a paraphilia known as autogynephilia. In "The Transsexual Phenomenon", Harry Benjamin (1966) writes that "Other transsexuals find prostitution a useful profession for emotional as well as practical reasons...":50–51 Benjamin goes on to say "How much more can his femininity be reaffirmed than by again and again attracting normal, heterosexual, and unsuspecting men and even being paid for rendering sex service as a woman?"
Researchers have recently found several demographic features that homosexual transsexuals tend to have in common. Ken Zucker(2002) and Yolanda Smith (2005) independently found that homosexual transsexuals are of lower average IQ, social class, and age. They were on average in their mid-teens to mid-20s when they reported to a gender clinic for sex reassignment. The homosexual transsexuals are more likely to have recent immigrant status, non-intact families, non-Caucasian race, and childhood behavior problems). Bailey found that most homosexual transsexuals learn to live on the streets, resorting to prostitution, or shoplifting.
D.F. MacFarlane studied transsexuals in Australia and New Zealand. MacFarlane found that in New Zealand that 90% of the homosexual transsexual prostitutes were Māori, an ethnic group who are only 9% of the overall population. In The Man Who Would Be Queen J. Michael Bailey says that about 60% of homosexual transsexuals he studied in Chicago were Latina or black; in his studies of gay males only 20% were non-white.(Bailey 2003) Bailey quoted the opinions of two of his subjects who attributed the difference to genetics, or inflexible gender roles in their respective cultures. MacFarlane similarly concluded that culture influenced the number of Māori homosexual transsexuals he observed.
Fraternal birth order effect
Recent research on the causes of homosexual transsexualism, transsexualism, and homosexuality overlap to a large degree. The etiology of transsexualism concerns the causes of transsexuality in general, including the theory that transsexualism is caused by differences in specific areas of the brain, while relationships between biology and sexual orientation have been studied in depth as possible causes of homosexuality.
Blanchard (1996) and Zucker (2007) came to the general conclusion that birth order has some influence over sexual orientation in biological males in general, and homosexual male to female transsexuals in specific. This phenomenon is called the "fraternal birth order effect". In 2000 Richard Green wrote "Homosexual male-to-female transsexuals have a later than expected birth order and more older brothers than other subgroups of male-to-female transsexuals. Each older brother increases the odds that a male transsexual is homosexual by 40%." Green did not find a higher incidence of homosexuality in the younger brothers of homosexual transsexuals.
Zucker and Blanchard wrote that studies have consistently supported the "fraternal birth order effect" that homosexual transsexuals have more brothers than sisters and are born later in birth order. In contrast, in their study using an Asian sample they found that the transsexual men had significantly more sisters than controls. Zucker attributes this to the preference for males in Korean society causing parents to stop having children once they have a boy. Therefore all male children are less likely to have older brothers and hence no fraternal birth order effect is observed. According to Bailey's interpretation of Blanchard's theory the causes of homosexual transsexuality are extreme examples of the causes of homosexuality in males.
Use in Blanchard's typology
Sexologist Ray Blanchard defined this category in his research, based on testing or self-report, and asserted based on his research that self-report is not always reliable. Morgan (1978), Blanchard (1985), Lawrence (2005) and other researchers have asserted that many "non-homosexual" transsexuals systematically distort their life stories because "non-homosexuals" were often screened out as candidates for surgery and because some see "homosexual transsexual" as a more socially desirable diagnosis. According to Blanchard (1985, 1987) key characteristics include conspicuous cross-gender behavior from childhood through adulthood, and a "homosexual" sexual orientation. Blanchard also says that non-homosexual transsexual women (as well as all other non-homosexual male gender dysphorics) have a condition called autogynephilia and are aroused by the idea or image of themselves as women. Blanchard (1987) found in his studies that homosexual transsexuals were younger when applying for sex reassignment, reported a stronger cross-gender identity in childhood, had a more convincing cross-gender appearance, and functioned psychologically better than "non-homosexual" transsexuals. A lower percentage of the homosexual transsexuals reported being (or having been) married and sexually aroused while cross-dressing. Studies have variously found that between 10% and 36% of homosexual transsexuals report a history of sexual arousal to cross dressing. Bentler (1976) found 23%, while Freund (1982) reported 31%.
Previous taxonomies, or systems of categorization, used the terms "classic transsexual" or "true transsexual," terms once used in differential diagnoses. Blanchard (1995) also said homosexual transsexuals were comparatively shorter and lighter in proportion to their height than non-homosexuals. Independent research done by Johnson (1990) and Smith (2005) concur with most of Blanchard's observations. Smith did not find a significant difference in height-weight ratio. Subsequent research has found only partial support of Smith's findings. Johson's 1990 work used the alternative term "androphilic transsexual", Johson wrote that there was a correlation between social adjustment to the new gender role and androphilia.
Gynephilic female to male transsexuals
In 2000 Meredith L. Chivers and Bailey wrote "Transsexualism in genetic females has previously been thought to occur predominantly in homosexual (gynephilic) women." According to them Blanchard reported in 1987 that only 1 in 72 female to male transsexuals he saw at his clinic were primarily attracted to men. They write that these individuals were so uncommon that some researchers thought that androphilic female to male transsexuals did not exist or they were misdiagnosed them as homosexual transsexuals, attracted to women. Relatively few studies have examined childhood gender variance in biological females.
In the 2005 study by Smith and van Goozen, their findings in regards to female to male transsexuals were different from their findings for male to female transsexuals. Smith and van Goozen's study included 52 female to male transsexuals, who were categorized as either homosexual or non-homosexual. Smith concluded that female to male transsexuals, regardless of sexual orientation, reported more GID symptoms in childhood, and a stronger sense of gender dysphoria. Smith wrote that she found some differences between homosexual and non-homosexual female to male transsexuals. Smith says that non-homosexual female to males reported more gender dysphoria than any group in her study. Smith says "It is of interest, though, that a few female to male transsexuals reported to have been sexually aroused in adolescence when dressing in male clothes, as this has never been reported before."
MRI studies and neurological differences
The concept that androphilic male to female transsexualism is related to homosexuality in masculine homosexual males has been tested by MRI studies. These studies have been interpreted as supporting Blanchard's transsexualism typology. These studies show neurological differences between homosexual transsexuals and controls as well as differences between homosexual and non-homosexual transsexuals.
A more precise recent study  looked at the brains of homosexual aspiring transsexual males and females who reported to a gender clinic who had also not had any hormonal treatments. The question the research wished to address was the existence of any differences between transsexuals and non-transsexual brains. Wishing to avoid clouding the issue with a sample of mixed sexual orientations given Blanchard's theory was their stated reason for selecting homosexual transsexuals. This study also controlled for possible influence of external hormones by looking at subjects who had not taken any yet. The study found the following in its sample of homosexual transsexuals :
We found that transsexual subjects did not differ significantly from controls sharing their gender identity but were different from those sharing their biological gender in their regional GM volume of several brain areas, including the left and right precentral gyri, the left postcentral gyrus (including the somatosensory cortex and the primary motor cortex), the left posterior cingulate, precueneus and calcarinus, the right cuneus, the right fusiform, lingual, middle and inferior occipital, and inferior temporal gyri. Additionally, we also found areas in the cerebellum and in the left angular gyrus and left inferior parietal lobule that showed significant structural difference between transgender subjects and controls, independent from their biological gender.
- Freund K, Nagler E, Langevin R, Zajac A, Steiner B (1974). Measuring feminine gender identity in homosexual males. Archives of Sexual Behavior, Volume 3, Number 3 / May, 1974, pp. 249-260.
- Person ES, Ovesey L (1974). The Psychodynamics of Male Transsexualism. In Friedman RC, Richart RM, and Vande Wiele LR (eds.) Sex Differences in Behavior, pp. 315-331. John Wiley & Sons, ISBN 9780471280538
- Chivers, ML, Bailey JM (2000). Sexual orientation of female-to-male transsexuals: A comparison of homosexual and non-homosexual types. Archives of Sexual Behavior, Volume 29, Number 3, pp. 259-278.
- Blanchard, R. (1985). Typology of male-to-female transsexualism. Archives of Sexual Behavior, 14, 247-261.
- Hirschfeld M (1922). "Sexualpathologie", German
- Benjamin H (1966). The Transsexual Phenomenon. The Julian Press ASIN: B0007HXA76
- The Transsexual Phenomenon Chapter 2 table 1
- Spitzer, Robert. "The diagnostic status of homosexuality in DSM-III: a reformulation of the issues -- Spitzer 138 (2): 210 -- Am J Psychiatry". ajp.psychiatryonline.org. Retrieved 2009-04-22.
- Lothstein, Leslie Martin (1983). Female-to-male transsexualism. Routledge. p. 60. ISBN 0-7100-9476-0. Retrieved 2009-04-24.
- Meyer, Walter; Walter O. Bockting; Peggy Cohen-Kettenis; et al (February 2001). The Harry Benjamin International Gender Dysphoria Association's Standards Of Care For Gender Identity Disorders, Sixth Version (PDF). 6th. Harry Benjamin International Gender Dysphoria Association. Retrieved 2009-04-22.
- Freund K, Steiner BW, Chan S (1982). Two types of cross-gender identity. Archives of Sexual Behavior, 1982 Feb;11(1):49-63.
- Wahng SJ (2004). Double Cross: Transamasculinity Asian American Gendering in Trappings of Transhood. in Aldama AJ (ed.) Violence and the Body: Race, Gender, and the State. Indiana University Press. ISBN 025334171X
- Blanchard, Ray; Kurt Freund (1990). Carole A. Beere, ed. Gender Roles. Greenwood Publishing Group. p. 35. ISBN 0-313-26278-0. Retrieved 2009-04-21.
- Lawrence, Anne; Latty, Elizabeth M; Chivers, ML; Bailey, JM (April 2005). "Measurement of sexual arousal in postoperative male-to-female transsexuals using vaginal photoplethysmography.". Archives of Sexual Behavior 34 (2): 135–145. doi:10.1007/s10508-005-1792-z. PMID 15803248. 1573-2800.[dead link]
- Leavitt, Frank; Berger, Jack C. (October), "Clinical patterns among male transsexual candidates with erotic interest in males", Archives of Sexual Behavior 19 (5): 491-505, doi:10.1007/BF02442350, 1573-2800
- Bagemihl B. Surrogate phonology and transsexual faggotry: A linguistic analogy for uncoupling sexual orientation from gender identity. In Queerly Phrased: Language, Gender, and Sexuality. Anna Livia, Kira Hall (eds.) pp. 380 ff. Oxford University Press ISBN 0195104714
- BenjaminQ, Harry. The Transsexual Phenomenon. Chapter 2, Paragraph 16.
- Diamond M, Karlen A (1980). Sexual Decisions. Little, Brown, ISBN 9780316183888
- Diamond M (2006). Biased-Interaction theory of psychosexual development: "how does one know if one is male or female?" Sex Roles: A Journal of Research
- Benjamin "Transsexual Phenomena" chapter 2 (This needs publisher and date of publication)
- Shefer, Tamara; Boonzaier, Floretta (2006). The Gender of Psychology (Illustrated ed.). Juta and Company Limited. ISBN 978-1-919713-92-2. ISBN 1-919713-92-1. (see pages 273-274, 282)
- Mass L (1990). ‘’Dialogues of the Sexual Revolution.’’ Haworth Press, ISBN 9781560240464 p. 122
- Morgan AJ Jr (1978). Psychotherapy for transsexual candidates screened out of surgery. Archives of Sexual Behavior. 7: 273-282.|
- Leiblum SR, Rosen RC (2000). Principles and Practice of Sex Therapy, Third Edition. ISBN 1-57230-574-6,Guilford Press of New York, c2000.
- Bancroft, John (2008). "Lust or Identity?". Archives of Sexual Behavior (Springer) 37 (3): 426–428. doi:10.1007/s10508-008-9317-1. PMID 18431640. Retrieved January 2009.
- Diamond, M. (2002a). Sex and gender are different: Sexual identity and gender identity are different. Clinical Child Psychology and Psychiatry, 7, 320-334.
- Johnson SL, Hunt DD (1990). The relationship of male transsexual typology to psychosocial adjustment. Archives of Sexual Behavior, Volume 19, Number 4 / August, 1990 349-360.
- James A (2006). A defining moment in our history: Examining disease models of gender identity. Gender Medicine. 3:56 ISSN:15508579
- Lane R (2008). Truth, Lies, and Trans Science. Archives of Sexual Behavior 37:3, 453-456
- Bailey, J. Michael; Kiira Triea (Autumn 2007). "What Many Transgender Activists Don't Want You to Know: and why you should know it anyway". Perspectives in Biology and Medicine (The Johns Hopkins University Press) 50 (4): 512–534. doi:10.1353/pbm.2007.0041. ISSN 1529-8795. PMID 17951886.
- Bailey JM (2003). The Man Who Would Be Queen: The Science of Gender-Bending and Transsexualism.Joseph Henry Press, ISBN 0-309-08418-0
- Cohen-Kettenis, Peggy T.; Owen A.; Kaijser V.; Bradley S.; Zucker K. (February 2003). "Gender-Dysphoric Children and Adolescents: A Comparative Analysis of Demographic Characteristics and Behavioral Problems.". Journal of Abnormal Child Psychology (Netherlands: Springer Netherlands) 31 (1): 41–53. doi:10.1023/A:1021769215342. PMID 12597698.
- MacFarlane, D. F. (August 1984). "Transsexual prostitution in New Zealand: Predominance of persons of Maori extraction". Archives of Sexual Behavior (Netherlands: Springer) 13 (4): 301–309. doi:10.1007/BF01541903. PMID 6487074. Retrieved 2008-02-26.
- Smith, Yolanda L.S.; Stephanie Van Goozen; Aj Kupier; Peggy T. Cohen-Kettenis (2005-12-15). "Transsexual subtypes: Clinical and theoretical significance" (PDF). Psychiatry Research (Elsevier) 137 (3): 151–160. doi:10.1016/j.psychres.2005.01.008. PMID 16298429. Retrieved 2007-06-26.
- Blanchard, R. (1994). A structural equation model for age at clinical presentation in nonhomosexual male gender dysphorics. Archives of Sexual Behavior, 23, 311-320
- Blanchard, Ray; Zucker, Kenneth J.; Cohen-Kettenis, PT; Gooren, LJ; Bailey, JM (October 1996). "Birth order and sibling sex ratio in two samples of Dutch gender-dysphoric homosexual males". Archives of Sexual Behavior 25 (5): 495–514. doi:10.1007/BF02437544. PMID 8899142.
- Zucker, Kenneth J; Blanchard, Ray (October 2007). "Birth order and sibling sex ratio in homosexual transsexual South Korean men: Effects of the male-preference stopping rule". Psychiatry and Clinical Neurosciences, 61 (5): 529–533. doi:10.1111/j.1440-1819.2007.01703.x.
- Green, Richard (July 2000). "Birth order and ratio of brothers to sisters in transsexuals". Psychological Medicine 30 (4): 789–795. doi:10.1017/S0033291799001932. PMID 11037086.
- Blanchard, Ray; Leonard H. Clemmensen; Betty W. Steiner (December 1985). "Social desirability response set and systematic distortion in the self-report of adult male gender patients". Archives of Sexual Behavior (Netherlands: Springer) 14 (6). 1573-2800.
- Blanchard R, Clemmensen LH, Steiner BW (1987). Heterosexual and homosexual gender dysphoria. Archives of Sexual Behavior, Volume 16, Number 2 / April, 1987
- Bentler P M (1976). "A typology of transsexualism: Gender identity theory and data." Archives of Sexual Behavior 5: 567-584.
- Blanchard R (1985). "Typology of male-to-female transsexualism." Archives of Sexual Behavior, 14, 247-261.
- Benjamin H (1966). ""Three different types of transsexual" The Transsexual Phenomenon.". Julian Press ASIN B0007HXA76.
- Blanchard R, Dickey R, Jones CL. Comparison of height and weight in homosexual versus non-homosexual male gender dysphorics. Archives of Sexual Behavior 1995 Oct;24(5):543-54.
- Kreukels, Baudewijntje; Peggy Cohen-Kettenis (15 January 2008). "Male-to-female transsexual subtypes: Sexual arousal with cross-dressing and physical measurements". Psychiatry Research (Psychiatry Research) 137 (1): 321. doi:10.1016/j.psychres.2007.06.019. Retrieved 2009-04-21.
- Simon, Lajos; Lajos R. Kozák; Viktória Simon mail; Pál Czobor; Zsolt Unoka; Ádám Szabó; Gábor Csukly (December 31, 2013). "Regional Grey Matter Structure Differences between Transsexuals and Healthy Controls—A Voxel Based Morphometry Study". PLOS ONE. doi:10.1371/journal.pone.0083947. Retrieved 30 April 2014.
- Cantor, James M (July 8, 2011). "New MRI Studies Support the Blanchard Typology of Male-to-Female Transsexualism". Archives of Sexual Behavior 40 (5): 863–864. doi:10.1007/s10508-011-9805-6. PMC 3180619. Retrieved 30 April 2014.
- "Autogynephilia and the Taxonomy of Gender Identity Disorders in Biological Males" - Ray Blanchard, PhD 2000