Heylens G, De Cuypere G, Zucker KJ, Schelfaut C, Elaut E, Vanden Bossche H, et al. (March 2012). „Gender identity disorder in twins: a review of the case report literature“. The Journal of Sexual Medicine. 9 (3): 751–7. doi:10.1111/j.1743-6109.2011.02567.x. PMID22146048. „Of 23 monozygotic female and male twins, nine (39.1%) were concordant for GID; in contrast, none of the 21 same‐sex dizygotic female and male twins were concordant for GID, a statistically significant difference (P = 0.005)... These findings suggest a role for genetic factors in the development of GID.“
Diamond M (2013). „Transsexuality Among Twins: Identity Concordance, Transition, Rearing, and Orientation“. International Journal of Transgender Health. 14 (1): 24–38. doi:10.1080/15532739.2013.750222. S2CID144330783. „Combining data from the present survey with those from past-published reports, 20% of all male and female monozygotic twin pairs were found concordant for transsexual identity... The responses of our twins relative to their rearing, along with our findings regarding some of their experiences during childhood and adolescence show their identity was much more influenced by their genetics than their rearing.“
Bentz EK, Hefler LA, Kaufmann U, Huber JC, Kolbus A, Tempfer CB (July 2008). „A polymorphism of the CYP17 gene related to sex steroid metabolism is associated with female-to-male but not male-to-female transsexualism“. Fertility and Sterility. 90 (1): 56–9. doi:10.1016/j.fertnstert.2007.05.056. PMID17765230.
Swaab DF (December 2004). „Sexual differentiation of the human brain: relevance for gender identity, transsexualism and sexual orientation“. Gynecological Endocrinology. 19 (6): 301–12. doi:10.1080/09513590400018231. PMID15724806. S2CID1410435.
Blanchard R (October 1989). „The concept of autogynephilia and the typology of male gender dysphoria“. The Journal of Nervous and Mental Disease. 177 (10): 616–23. doi:10.1097/00005053-198910000-00004. PMID2794988.
Blanchard R (October 1989). „The concept of autogynephilia and the typology of male gender dysphoria“. The Journal of Nervous and Mental Disease. 177 (10): 616–23. doi:10.1097/00005053-198910000-00004. PMID2794988.
Blanchard R (Winter 1991). „Clinical observations and systematic studies of autogynephilia“. Journal of Sex & Marital Therapy. 17 (4): 235–51. doi:10.1080/00926239108404348. PMID1815090.
Gijs L, Carroll RA (2011). „Should Transvestic Fetishism Be Classified inDSM 5? Recommendations from the WPATH Consensus Process for Revision of the Diagnosis of Transvestic Fetishism“. International Journal of Transgender Health. 12 (4): 189–197. doi:10.1080/15532739.2010.550766.
Bailey JM, Vasey PL, Diamond LM, Breedlove SM, Vilain E, Epprecht M (September 2016). „Sexual Orientation, Controversy, and Science“. Psychological Science in the Public Interest. 17 (2): 45–101. doi:10.1177/1529100616637616. PMID27113562. S2CID42281410.
Heylens G, De Cuypere G, Zucker KJ, Schelfaut C, Elaut E, Vanden Bossche H, et al. (March 2012). „Gender identity disorder in twins: a review of the case report literature“. The Journal of Sexual Medicine. 9 (3): 751–7. doi:10.1111/j.1743-6109.2011.02567.x. PMID22146048. „Of 23 monozygotic female and male twins, nine (39.1%) were concordant for GID; in contrast, none of the 21 same‐sex dizygotic female and male twins were concordant for GID, a statistically significant difference (P = 0.005)... These findings suggest a role for genetic factors in the development of GID.“
Bentz EK, Hefler LA, Kaufmann U, Huber JC, Kolbus A, Tempfer CB (July 2008). „A polymorphism of the CYP17 gene related to sex steroid metabolism is associated with female-to-male but not male-to-female transsexualism“. Fertility and Sterility. 90 (1): 56–9. doi:10.1016/j.fertnstert.2007.05.056. PMID17765230.
Swaab DF (December 2004). „Sexual differentiation of the human brain: relevance for gender identity, transsexualism and sexual orientation“. Gynecological Endocrinology. 19 (6): 301–12. doi:10.1080/09513590400018231. PMID15724806. S2CID1410435.
Blanchard R (October 1989). „The concept of autogynephilia and the typology of male gender dysphoria“. The Journal of Nervous and Mental Disease. 177 (10): 616–23. doi:10.1097/00005053-198910000-00004. PMID2794988.
Blanchard R (October 1989). „The concept of autogynephilia and the typology of male gender dysphoria“. The Journal of Nervous and Mental Disease. 177 (10): 616–23. doi:10.1097/00005053-198910000-00004. PMID2794988.
Blanchard R (Winter 1991). „Clinical observations and systematic studies of autogynephilia“. Journal of Sex & Marital Therapy. 17 (4): 235–51. doi:10.1080/00926239108404348. PMID1815090.
Diamond M (2013). „Transsexuality Among Twins: Identity Concordance, Transition, Rearing, and Orientation“. International Journal of Transgender Health. 14 (1): 24–38. doi:10.1080/15532739.2013.750222. S2CID144330783. „Combining data from the present survey with those from past-published reports, 20% of all male and female monozygotic twin pairs were found concordant for transsexual identity... The responses of our twins relative to their rearing, along with our findings regarding some of their experiences during childhood and adolescence show their identity was much more influenced by their genetics than their rearing.“
Swaab DF (December 2004). „Sexual differentiation of the human brain: relevance for gender identity, transsexualism and sexual orientation“. Gynecological Endocrinology. 19 (6): 301–12. doi:10.1080/09513590400018231. PMID15724806. S2CID1410435.