Abstract
There is indirect evidence that heightened exposure to early androgen may increase the probability that a girl will develop a homosexual orientation in adulthood. One such putative marker of early androgen exposure is the ratio of the length of the index finger (2D) to the ring finger (4D), which is smaller in male humans than in females, and is smaller in lesbians than in heterosexual women. Yet there is also evidence that women may have different sexual orientations at different times in their lives, which suggests that other influences on female sexual orientation, presumably social, are at work as well. We surveyed individuals from a gay pride street fair and found that lesbians who identified themselves as “butch” had a significantly smaller 2D:4D than did those who identified themselves as “femme.” We conclude that increased early androgen exposure plays a role in only some cases of female homosexuality, and that the sexual orientation of “femme” lesbians is unlikely to have been influenced by early androgens.
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REFERENCES
Bailey, J. M., Pillard, R. C., Neale, M. C., & Agyei, Y. (1993). Heritable factors influence sexual orientation in women. Archives of General Psychiatry, 50, 217-223.
Breedlove, S. M., Cooke, B., & Jordan, C. L. (1998). The orthodox view of sexual differentiation of the brain. Brain, Behavior and Evolution, 54, 8-14.
Brown, W. M., Finn, C., & Breedlove, S. M. (2001). A sex difference in the digit length ratio in mice (Abstract). Hormones and Behavior, 39, 325.
Brown, W. M., Hines, M., Fane, B., & Breedlove, S. M. (2001). Masculinized finger length ratios in humans with congenital adrenal hyperplasia (CAH) (Abstract). Hormones and Behavior, 39, 325-326.
Diamond, L. M. (1998). Development of sexual orientation among adolescent and young adult women. Developmental Psychology, 34, 1085-1095.
Ecker, A. (1875). Einige bemerkungen über einen schwankenden charakter in der hand des menschen. [Some remarks about a varying character in the hand of humans.] Archiv f¨ur Anthropologie, 8, 68-74.
George, F.W., & Wilson, J. D. (1994). Sex determination and differentiation. In E. Knobil & J.D. Neil (Eds.), The physiology of reproduction (pp. 3-28). New York: Raven Press.
George, R. (1930). Human finger types. Anatomical Record, 46, 199-204.
Laner, M. R., & Laner, R.H. (1980). Sexual preference or personal style? Why lesbians are disliked. Journal of Homosexuality, 5, 339-356.
Manning, J. T., Scott, D., Wilson, J., & Lewis-Jones, D. I. (1998). The ratio of 2nd to 4th digit length: A predictor of sperm numbers and concentrations of testosterone, luteinizing hormone and oestrogen. Human Reproduction, 13, 3000-3004.
McFadden, D. (2002). Masculinization effects in the auditory system. Archives of Sexual Behavior, 31, 93-105.
McFadden, D., & Champlin, C. A. (2000). Comparison of auditory evoked potentials in heterosexual, homosexual, and bisexual males and females. Journal of the Association of Research in Otolaryngology, 1, 89-99.
McFadden, D., & Pasanen, E. G. (1998). Comparison of the auditory systems of heterosexuals and homosexuals: Click-evoked otoacoustic emissions. Proceedings of the National Academy of Sciences of the United States of America, 95, 2709-2713.
Phoenix, C. H., Goy, R. W., Gerall A. A., & Young, W. C. (1959). Organizing action of prenatally administered testosterone propionate on the tissues mediating mating behavior in the female guinea pig. Endocrinology, 65, 369-382.
Robinson, S. J., & Manning, J. T. (2000). The ratio of 2nd to 4th digit length and male homosexuality. Evolution and Human Behavior, 21, 333-345.
Singh, D., Vidaurri, M., Zambarano, R. J., & Dabbs, J.M.(1999). Lesbian erotic role identification: Behavioral, morphological, and hormonal correlates. Journal of Personality and Social Psychology, 76, 1035-1049.
Tortorice, J. (2001). Gender identity, sexual orientation, and second to-fourth digit ratio in females [abstract]. Human Behavior and Evolution Society Abstracts, 13, 35.
Williams, T. J., Pepitone, M. E., Christensen, S. E., Cooke, B. M., Huberman, A. D., Breedlove, T. J., Jordan, C. L., et al. (2000). Finger length patterns indicate an influence of fetal androgens on human sexual orientation. Nature, 404, 455-456.
Wilson, G. D. (1983). Finger-length as an index of assertiveness in women. Personality and Individual Differences, 4, 111-112.
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Brown, W.M., Finn, C.J., Cooke, B.M. et al. Differences in Finger Length Ratios Between Self-Identified “Butch” and “Femme” Lesbians. Arch Sex Behav 31, 123–127 (2002). https://doi.org/10.1023/A:1014091420590
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DOI: https://doi.org/10.1023/A:1014091420590