On the Science of Changing Sex

Male Androphilia Runs In Both Father’s and Mother’s Families

Posted in Transsexual Field Studies by Kay Brown on April 7, 2022

Male homosexuality has long been known to have a very high consanguinity, that is, gay men and homosexual transsexuals are both very likely to have male relatives who are also either gay or homosexual transsexual. There has been some question as whether it ‘runs in the family’ or not and if so, on the mother’s or the father’s side. Well, that question has been answered. It can be either or both.

Earlier, some studies have shown that there is an X chromosome linkage which would only be passed down from the mother. (A male child can only get an X chromosome from their mother, their Y chromosome partner, causing them to be male, always comes from their father.

But two studies of androphilic males in Somoa and Mexico, demonstrate conclusively, that not only does it run in families, it does so on both sides of the family. Further, the Mexican study, involving Muxe that are both trans and gay male, show that this family linkage is the same linkage for both. That is to say, it provides additional indication that homosexual transsexuals are a subset of more traditional homosexual males, not a different etiological taxon.

This last point will not be popular with the “all transsexuals” are the same and are NOT related to gay men. Sorry Virginia, that’s not what the science tells us.

From the Mexican study,

Overall, muxes were characterized by significantly more muxe relatives than gynephilic men. This familial patterning was equivalent in both the paternal and maternal lines of muxes. The population prevalence rate of male androphilia was estimated to fall between 3.37–6.02% in the Istmo Zapotec

And from the Samoan study,

Samoan fa’afafine had significantly more fa’afafine relatives in their maternal and paternal lines compared to Samoan gynephilic males. The prevalence of male androphilia was equivalent across both the paternal and maternal lines. The revised prevalence estimate of male androphilia in Samoa falls between 0.61% and 3.51%.

It should be noted that the fa’afafine are only the trans type, thus the smaller prevalence number, since they don’t include the non-trans type of androphilic male.

A key point to this is that HSTS transwomen are much more likely to have another HSTS transwoman or gay male relative than either a non-trans man or an autogynephilic transwoman would. Another bit of evidence that there are two (and only two) types of MTF transsexuals.

Further Reading:

Oh Brother, Where Art Thou?


Gomez, et al, “Familial patterning and prevalence of male androphilia among Istmo Zapotec men and muxes“, PLOS ONE, 2018 https://doi.org/10.1371/journal.pone.0192683

Semanya, et al, “Familial Patterning and Prevalence of Male Androphilia in Samoa”, Journal of Sex Research, 2016, https://doi.org/10.1080/00224499.2016.1218416

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