If you are pumping occasionally and prefer to feed babies directly from breast most of the time, then you should pump in the morning – as it is the time where you can produce most of the milk. You can pump between the breast feeding sessions by about an hour. You can either pump 1 hour before the baby is hungry or 1 hour after the breast feeding is complete. However, if you are only pumping milk instead of breast feeding then you should pump once in 2 – hours. Emptying your breasts efficiently provides signals to make more.