While the chances of having a girl with DMD are extremely low – approximately 1 in 50 million – it can happen.3
A girl will only develop DMD if both of her X chromosomes have faulty dystrophin genes. This may happen if she has a faulty dystrophin gene on the X chromosome she inherited from her mother and also develops a spontaneous mutation in the X chromosome that she inherited from her father.2,3
Girls affected by DMD normally have less severe symptoms than boys, but they may need the same treatment and care.2
This is because an affected father only passes a Y chromosome to his sons (the DMD-causing gene is located on the X chromosome). However, he will pass the DMD-causing gene onto his daughters, because each daughter inherits her father’s only X chromosome. These daughters will be carriers.2
People have no choice in the genetic conditions that are passed on in a family. Nobody did anything wrong to cause DMD so there is no reason to blame yourself or others.
*Carriers may show signs and symptoms of DMD and may need treatment
Adapted from Muscular Dystrophy Association.2
While the chances of having a girl with DMD are extremely low – approximately 1 in 50 million – it can happen3
(excluding UK and Ireland)
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