I am having a baby, would I be able to donate cord blood to my mother fighting sarcoma cancer?

This may be a stupid question but Is there even a way to go about this? I dont want to mention it to her unless I have some actual information. I am trying to do some research now but everything I am finding is about using the cord blood in the future for a relative... Thanks for the help and input Reddit!

edit: I am aware that cord blood is banked AFTER birth and that for anyone to use it they have to match it to a certain extent...