I pump breastmilk while at work, usually twice a workday (occasionally just once, at mid-day, if meetings are back-to-back), and I kept a photolog of the past two weeks' worth of pumping. Just because. Why not. And here are the pics!
...Many moms think that they should be able to pump 4-8 ounces per pumping session, but even 4 ounces is an unusually large pumping output.
It is quite normal to need to pump 2-3 times to get enough milk for one feeding for baby (remember that the pump cannot get as much milk as a baby who nurses effectively)...
I try and put Ilse to nurse on the left side often. And I pump on that side as often (if not even a little bit more, for a few extra minutes) than the right. But, for whatever reason, most of the milk pumped comes from my right breast. If I weren't pumping I wouldn't even know. I don't look/feel uneven, and overall there's plenty of milk for the baby, so I'm not complaining. It's just... a little strange, maybe? I don't know if it's really that I make less milk on that side or whether the let-down on that side just refuses to relax for the pump (but might be just fine for my baby while nursing?).