yuki, if u don't pump at night, after some time, there will be no milk for that timing. I used to pump at 2am and 6am. The first few days I skipped the 2am timing, I can get about 400ml at 6am. cos i was too lazy to wash 2 bottles... so i only pumped into 1 big 300ml bottle, and the supply became 300ml.
You have to maintain the duration interval too.
manu, that was in the past .. after he go ifc, he drinks so little.. so now is less chubby and put on weight very slowly. My bb also doesn't cry for more milk but I am paranoid, so I make him eat/drink every 2hrs. How heavy is your baby now?