Scientists identify gender gene
Dan Harrison; 6/7/08
Australian researchers have discovered how a change to one gene halts the process of an embryo becoming a boy. The research could lead to improved treatment options for the one in 4500 people who suffer from a disorder of sex development (DSD) - a group of conditions which occur when the sex chromosomes do not match the genitals.Some DSD children are born with ambiguous or incomplete genitalia, making it difficult to identify gender.
See: http://www.smh.com.au/news/science/scientists-identify-gender-gene/2008/07/05/1214951110567.html