Elevated sinistrality in transsexuals.

Elevated Sinistrality in Transsexuals

On the basis of both Geschwind andBehan's (1984) theory—that at least part of the genesis of left-handedness can be ascribed to overexposure to testosterone during fetal development—andDorner's (1980;Dorneretal., 1991) theory—that transsexuality emerges from prenatal overor underexposure to androgens infemale-to-male (FTM) andmale-to-female (MTF) transsexuals, respectively—it was predicted that...

The Wages of Sinistrality: Appendix

Olympic sports and transsexuals.

Sex segregation in competitive sports is regarded as fair. Before puberty boys and girls do not differ in height, muscle and bone mass. Testosterone (T) exposure during puberty leads to an ultimate average greater height in men of 12-15 cm, longer and larger bones and muscle mass and strength and higher hemoglobin levels. Postpubertal androgen ablation reverses, at least in part, previous anabo...

Gender-related traits in transsexuals and nontranssexuals.

Thirty-eight male-to-female (M-to-F) transsexuals, 7 female-to-male (F-to-M) transsexuals, 135 nontranssexual men, and 225 nontranssexual women were assessed on the following: gender diagnosticity (GD) measures, which assessed male- vs. female-typical occupational and hobby preferences; instrumentality; expressiveness; self-ascribed masculinity; and self-ascribed femininity. M-to-F transsexuals...

Finger Length Ratios in Serbian Transsexuals

Atypical prenatal hormone exposure could be a factor in the development of transsexualism. There is evidence that the 2nd and 4th digit ratio (2D:4D) associates negatively with prenatal testosterone and positively with estrogens. The aim was to assess the difference in 2D:4D between female to male transsexuals (FMT) and male to female transsexuals (MFT) and controls. We examined 42 MFT, 38 FMT,...