I have no clue, but I've wondered that myself. I know boobs are never truly "empty" but sometimes they feel empty with no letdown and other times I'm borderline engorged with a major pins and needles feeling, and it can be the exact same amount of time between feeds.
I didn't even consider that lack of sleep could effect supply...went thru a rough patch recently where LO wasn't sleeping at all and still feel I'm recovering...
How much I eat in a day, and what, fluctuates also, so this could be effecting supply? I guess I'm not sure how MUCH I should eat as my appetite is ravenous but I still have baby weight to lose so that makes me tempted to cut back.
I ALWAYS drink at least 5 liters of water a day though.
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