Prevalencia de Síndrome de Rett: a cuántas personas afecta en el mundo y diferencias por sexo y región, con fuentes.
Original
In occurs mainly in females. It's prevalence is 1 in 10,000. When it does occur in male, it is very likely they have an extra x chromosome. Most males die before birth, and those who survive, usually don't survive past 2 years.