Abstract
Twenty female transsexuals were assessed for sexual reassignment surgery in Singapore. This gives a prevalence of 1 in 36,000 for females aged 15 and above. The age ranged from 18 to 31 with the mean at 24.9 years. Fifteen had received secondary education and 19 were employed. There was no history of serious anti-social behaviour. They were closer to their mothers, some of whom encouraged their cross dressing behaviour during childhood. Eighteen started to develop the transsexual syndrome during childhood. Their behaviour became more masculine as they grew older. All were unmarried. Eighteen had girl friends and 10 indulged in sexual activities with their girl friends. They sought the sex change operation because they wanted to live as males so that they could marry their girl friends. Eight are at present under-going the multi-stage operation.