Why does one breast produce so much more milk when pumping?
It is not unusual for one breast to produce more milk than the other. It is quite normal. You have tried the obvious solutions with the breast shields and such. A woman’s breast can have more milk ducts in one breast than the other. This is why more milk can be produced in that breast. Interesting fact is that if you are right handed….your right breast will produce more. If you are left handed…your left breast. Not 100% true , but normally that is the case. You are doing great and don’t worry unless you feel engorged in that left breast!