Results

Statistical analysis showed significant differences in the two following conditions:

1)═in the MtF group when comparing the andro-stadie-nтne with the estra-tetra-enol condition

2)═between the MtF and═the heterosexual women═ during the andro-stadie-nтne condition.

D 7 In particular, we found a major decrease in alpha rhythm (p= 0.015) and a major increase in beta rhythm (p=.001) in the Mtf group under the andro-stadie-nтne condition in the first case. D 8

D 9 In the second case we found the same results, a physiological arousal, - a major decrease in alpha rhythm (p= 0.045) and a major increase in the beta rhythm (p=.045)- in the MtF compared to the heterosexual women during the andro-stadie-nтne condition. D 10

On the contrary, we found no significant differences among the other conditions: D 11

1)═between the MtF and the heterosexual men during the estra-tetra-enol condition;

2)═between the andro-stadie-nтne condition and placebo in the heterosexual men.

3)═finally, between the estra-tetra-enol condition and placebo in the heterosexual women;

Discussion

Our results seem to demonstrate that the MtF group is the most responsive to the influence of pheromones. The significant difference between the two kinds of pheromones shows that the MtF are more receptive to the male pheromone than to the female one, according to the gender they feel they belong to and not to their biological gender.

Moreover, the significant difference with the heterosexual women suggests a major physiological arousal of the MtF under the pheromone effect during the erotic visual stimuli

On the contrary, in the heterosexual groups, the pheromones do not seem to produce any significant change compared to the placebo, during the erotic visual stimulation.

D 12

So, our study═highlights two important findings:

First: new evidence of biological differences between MtF transsexuals and men

Secondly: the fact that MtF transsexuals are more aroused than heterosexuals by erotic stimuli. Might this be a need to reinforce their gender identity?

We wish to emphasize this is a pilot study and so requires further research.

View the origin: Pheromones and Gender IdentityPdf 503 KB
Download the origin: ppt presentation - 283 KB