The epidemiology of<unk>  is not well understood. Individual studies include a 1986 report reviewing medical records in the Sardinian army which found a prevalence of 1 in 86,000 men and a 2011 report from Finland which found a prevalence of 1:30,000 for males and 1:125,000 for females.<unk>  occurs about 4 times more often in males than females, but is only 2.5 times more common among males in familial cases.
Kallmann syndrome
Klinefelter syndrome
Waldmann disease
Turner syndrome
Angelman syndrome
Hanhart syndrome
Parsonage–Turner syndrome
Gerstmann syndrome