I know it's more in depth than blood type and involves, HLA, etc.
However, my daughter needs a bone marrow transplant, she needs one or she will not live for very long. We are in the US.
She has a very rare blood type anyway and it has been very difficult to find blood for her to be given, but it's just about been ok. It's close to impossible to find a person with a correct HLA match so she can be given their bone marrow, or certainly not in time for when she needs it.
We were going to start TTC our second child anyway, before our daughter got ill, but then it didn't happen due to that, so we wouldn't just be having the baby to act as a savior sibling. Just making sure it has the rare genes that it needs, so it matches up with DD, so the cord can be used, no procedures from the child, ever. Just the cord will be used.
Is this really terrible? Our daughter needs to live and to just change something so minor doesn't seem like a very big price to pay, as in the child wouldn't know any different and we would be getting our second child we have always wanted...
It's so tough and I'm definitely not decided, hence I'm asking here