My dd is 15 months and I've been ebf and pumping the entire time. My left boob is worthless. I can still only get 1 - 2oz out it while pumping while my right boob will get double the amount.

We always tend t have a dud and a stud. Someone told me it is related to the hand we use. Meaning my left hardly produces compared to my right and I was told that because I am left handed that side has more muscle than my right side so produces less. Who knows...

Mine did the same thing with my last two kids and now my left boob hangs a little lower then my right.

Do you switch off which side you start nursing on? That can sometimes make a difference. If you always start on the same side it might produce more.

Also, maybe you let down on the other side might be slower or it might not respond to the pump as well. I find I can eventually get more out of my "dud" left side if I just pump longer on that side - which is super annoying when using a double electric so it usually doesn't happen.

The stud and the dud. My left will produce 8-10oz at a time. My right is lucky to produce 4oz. It's irritating.

Super normal to have a dominant and a slacker boob.

That's normal, I believe (I could be wrong) it's not common for both boobs to produce the same amount, the side that your baby feeds from more often is gonna make more.