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The chances of your child needing it are vanishingly small, but their is a chance it could help a child. So it's a great idea to donate to a bank but paying money to store it for your own use is probably a waste of money.

http://www.marrow.org/HELP/Donate_Cord_Blood_Share_Life/How_...

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I feel like a lot of the arguments here boil down to the same fact: There is very little chance that this will be useful. Most of the time this is a waste of money, but on the small minuscule off-chance that this might help people put money into it. Its like snake-oil, can't hurt but can't quite prove that it can help, but people take it on the off-chance that it might.

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