Decrease milk supply

Karina

Hi Mums, I noticed yesterday my milk supply has somewhat decreased when pumping (around 60-80ml). I normally can get around 100ml each session and I pump every 3hr. I still breastfeed during midnight feeds (so usually twice a day). Could this be because I breastfeed him less that's why my milk supply has decreased? I read that breastfeed stimulates more milk than any pumps.