What are disorders of sexual development (DSD)?
Babies who are born with incompletely developed external genitals or with external genitals which do not match their internal organs are said to have disorders of sexual development (DSD). DSD are considered congenital problems (problems present at birth) of development. DSD can have many causes.
What are chromosomes and how do they work?
Chromosomes are pieces of genetic material that contain all the information needed to control development and body function throughout life. Most girls have 2 X chromosomes (XX) and 46 chromosomes in total. Most boys have one X and one Y chromosome (XY) with 46 chromosomes in total. The X and Y chromosomes are called sex chromosomes. The other chromosomes are called autosomes. If there is a problem in how the sex chromosomes or other autosomes develop, doctors can often find these through genetic testing.