Average volumes of the equivalent cell group in sheep for heterosexual and homosexual rams and for ewes. Sex differences are formed under the influence of prenatal hormones in utero, rather than acquired after birth. (en)
Average volumes of INAH3 in straight and gay men and in women. (en)
This is the result we would expect if male sexual orientation were entirely due to nature, and it is opposite of the result expected if it were due to nurture, in which case we would expect that none of these individuals would be predominantly attracted to women. They show how difficult it is to derail the development of male sexual orientation by psychosocial means. (en)
