The first thing that you should consider is the sucking pattern of the baby. The baby will initially suck fast to express the milk.
Watch the sucking pattern.
Another way to figure out whether the baby is getting enough milk is to count the number of wet diapers. In the initial days, when your breastmilk is not steady.
Not enough wet diapers
A baby who is exclusively breastfed should have dark yellow poops with small flecks in it. The flecks come from the breast milk the baby is feeding.
All material provided is for your information only and should not be construed as medical advice or instruction. Please consult your doctor.