PKU.com Community Discussion Forum Parent support how much is the possibilituy of getting pku from the carrier parents of pku ? Reply To: how much is the possibilituy of getting pku from the carrier parents of pku ?

#8811
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Cook4Love
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For question 5, there is a 1:2 chance that your friend is a carrier, but 1:40 that her fiance is (unless you are in a country where PKU is more prevalent).  If the fiance is a carrier then there is a 1:4 chance they would have a child with PKU.  The statistical probability between being her being a carrier, him being one and the child having PKU is 1:320

Brenda

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