Hey there i went back to work once DS was 3-4months old only a few night a week, i could express then but since i am back a school 2 days a week i cant express the older he gets (dunno why!) Anyways once he was at care twice a week he was given goats milk (cant have cows milk) while i was away otherwise he just waited until i was home. 2 months down the track we are still successfully breastfeeding with no probs. The days im home it hasnt made any difference to my supply