My left breast produces significantly more than the right. When I pump (a few times a week) I do it for equal amounts of time. When my son nurses, I put him on the right side far more than the left, day and night. Today, my son had nursed a few hours before I went to school, emptying both sides. By the time I got around to pumping, my left breast was so full it ached, and I ended up getting 6 ounces from the left, 3 from the right. What gives? Why am I producing less on the side we use more, and what can I do about it? I'm doing all the extra nursing on the right to try to even out my supply, but it's been months, and if anything it seems worse than ever.