Friday, May 3, 2013

PWS Awareness Day #3: Incidence of PWS

The incidence of PWS is unknown, but estimates are that it occurs in 1 out of every 15,000-20,000 births. 

With the exception of the imprinting defect subtype (I described the subtypes yesterday), where there is sometimes an inherited tendency to have another child with PWS, the genetic mutations that cause PWS occur at random. Those families have less than 1% chance of having another child with PWS. 

PWS occurs equally in males and females and across all races and ethnicities.

(PWS families, I realize there are other nuances to this information, but for the sake of simplifying...)

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