Male-to-female (M-F) transsexuals differ consistently from female-to-m
ale (F-M) transsexuals in their sociodemographic characteristics, cros
s-gender and sexual history and the degree to which personality disord
er is concomitant to their transsexuality. As a group, female-to-male
transsexuals are more homogeneous. Both groups are impaired in their m
ental functioning, but the male-to-female population is more mentally
disordered. In a comparison between Dutch transsexuals and their Belgi
an counterparts, the latter were shown to have more mental problems.