pumping

Ashley
Did anyone start pumping before baby came? 
Edit* I'm 38 weeks and I'm being induced next week anyways, so preterm labor isn't what I'm worried about. My dr actually prefers that I try natural things to get my labor going on its own.
I am asking though because I didn't know how much should come out each time first starting out? Also I was told you can't pump away your colostrum because your body reproduces it.