also known as embryo screening. Its main advantage is that it avoids selective pregnancy termination as the method makes it highly likely that the baby will be free of the disease under consideration.

got that from wiki

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so they select which embryos will be implanted. i think this is good because for most of us who are undergoing ART this is our only chance to have a child.

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I agree with toni. treatments are expensive and then you end up with a sick child. PGD will increase chances of having a healthy child.

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