The clinical manifestations are highly variable, ranging from partial virilisation and ambiguous genitalia at birth, to patients with completely male or female gonads. Most individuals with this karyotype have apparently normal male genitalia, and a minority with female genitalia, with a significant number of individuals showing genital abnormalities or intersex characteristics.[2] A significantly higher than normal number of other developmental abnormalities are also found in individuals with X0/XY mosaicism.[2] Psychomotor development is normal.