Jas AFAIK the body is still creating colostrum when the baby is born. That's why it is ok to tandem feed

Sarah it is pretty painful to do unless your milk has come in - expressing when you can't get let down is bad enough...

You might be better off doing it as your milk comes in. I got more than six hundred mls just hand expressed when my milk was coming in becuase i had to get it off to relieve the pain.

Sorry I couldn't have been more help!