I have the exact same problem! I'm a first time mom to a 12 week old little girl and my pumping only yields 1 oz per side per pump. This yield is the same regardless of whether she is latched onto one side while I pump from the other, if I'm pumping before a feeding when I'm very full, or even after taking Fenugreek/Blessed Thistle combination recommended by my hospital's LC. It is so frustrating, and now that I have to return to work next week from a 12 wk maternity leave, I am scared that supply will dry up where I won't be able to nurse before and after work, if I can't pump during the day. I'm interested in hearing any suggestions from any more experienced pumpers out there, and thanks in advance for your help!