Studies are popping up all over the place about this - lower rates of anaemia (and other blood issues) for the baby, baby getting it's full store of blood, including 6-12 months supply of iron (formula companies market that so many babies are low in iron, wonder why?!) and lots of other things like that, it's your baby's supply of nutrients and oxygen until they take the first breath. It's actually alot of blood if you watch how much blood comes out in the surgical dish. I have posted some studies, look at the labour and birth sticky thread on FAQ's.

If you donate cord blood, you will need the cord to be clamped so they can get their blood, I'd chose not to donate, JMO

If you have the injection they need to cut the cord.