my baby is 5 months old and since he was 5 weeks I have been supplementing with formula. it is a roller coaster.... some days I have sufficient amounts and others I need to supplement a few times throughout the day.... my baby went through phases of rejecting my breasts... i've done everything and I am trying so hard. yet, again, i am low on my supply... maybe because I live in a very hot country in the summer months and I am sweating so much.... but it is so hard. Why do some woman have a lot of milk and others not??