People use embryo screening in America just to choose the gender of their child - isn't it much better to use it to save a life?
You can't stop people trying to create a saviour sibling, but if you allow them to use PGD, you make it much more likely that there new child will be a donor match
At least the saviour sibling is not ill - if they hadn't screened the embryos looking for a donor, they might have had a child with a serious genetic disorder
It's the loving thing to do for the existing sick child
It's good for the saviour sibling, as they are able to save someone's life. What a great start to their own life
It is possible to consent in retrospect - if saviour siblings say, later in life, that they are glad that they were created to save a sibling, you can't say that they had no choice in it
There may be no other choice
In most cases, no harm comes to the sibling - they simply take stem cells from the umbilical cord
Couples who create 'saviour siblings' would have wanted another child anyway, and could have ended up with the same child as the one screened for, so it's no different
It's not a 'designer baby', as you are not choosing anything about what the new baby will be like, only that it is free from the inherited disorder and is a donor match
It costs a lot of money to treat a child with a serious inherited disorder - a saviour sibling would save lots of money
