Disorders of sex development (DSDs), also known as differences in sex development or variations in sex characteristics (VSC),[2][3] are congenital conditions affecting the reproductive system, in which development of chromosomal, gonadal, or anatomical sex is atypical.[4] DSDs is a clinical term used in some medical settings for what are otherwise referred to as intersex traits. The term was first introduced in 2006 and has not been without controversy.
DSDs are subdivided into groups in which the labels generally emphasize the karyotype's role in diagnosis: 46,XX; 46,XY; sex chromosome; XX, sex reversal; ovotesticular disorder; and XY, sex reversal.[5]