I pump every night while my husband does the DF. I used to be able to get 4 oz, then 3 oz, and now I get between only 2 and 2.5, and have to get the rest in the morning. (I get up at 5:00 to pump another ox or two). I use the avent manual pump. I find I can only get a good pump if I've definitely felt my let down, then it just comes streaming out. I can hear it like a tap! What helps me pump more is having a pic of my DS infront of me when I pump.
Sonja