Zucker, Kenneth J.; Bradley, Susan J.; Sullivan, Claire B. Lowry (tháng 3 năm 1992). “Gender Identity Disorder in Children”. Annual Review of Sex Research. 3 (1): 73–120. doi:10.1080/10532528.1992.10559876. ISSN1053-2528.
https://www.who.int/genomics/gender/en/index1.html Trích: Intersex is defined as a congenital anomaly of the reproductive and sexual system... Typical sexual development is the result of numerous genes, and mutation in any of these genes can result in partial or complete failure of sex differentiation. These include mutations or structural anomalies of the SRY region on the Y chromosome resulting in XY gonadal dysgenesis, XX males, or XY females; defects of androgen biosynthesis or androgen receptors, and others...
Zucker, Kenneth J.; Bradley, Susan J.; Sullivan, Claire B. Lowry (tháng 3 năm 1992). “Gender Identity Disorder in Children”. Annual Review of Sex Research. 3 (1): 73–120. doi:10.1080/10532528.1992.10559876. ISSN1053-2528.