Hellobee Boards

I used to pump 20 minutes 2-3 times a day and would get 5-6oz per side, so 10-12 total.
To be fair, I SHOULD have been pumping every 2-3 hours (I was EP'ing) but I was awful at making the time to do it, so had I been pumping as often as I should, it might have been more like 5-6oz total per session. I think I only pumped so much because I was waiting till I couldn't take it anymore.

In the morning I pump the side DD doesn't eat on and get approx 6-8 oz in 12-15 min. Then I pump once at work, both sides, and get 7-9 oz total in about 17-20 min. She takes about 11-12 oz at daycare so I'm still getting more than enough. I was pumping twice at work and recently switched to once because I was getting way too much extra.

I never got more than an 1 oz. more typically 0.5 oz. that's with both sides for 10-15 min each.

This varied SO much for me over the months that I pumped, based on how far postpartum I was, whether I had returned to work, if we had introduced solids, all that stuff. Not to mention the time of day, of course. I would say most typical was around 4-5oz total from both sides. I think my record was 12oz from one session.

I pump for 20-25 min twice per day and get 10-12 oz total in the morning and maybe 4-5oz in the afternoon.

@sunny: It really is going to vary from woman to woman. Women with smaller storage capacities need to pump/feed more often than those with larger.
http://www.nancymohrbacher.com/articles/2014/1/17/infographic-on-breast-storage-capacity.html