Presented is a method for quantifying breastfeeding between a mother and a baby, the method including measuring a physiological volume indicative of stomach fullness volume for the baby； setting a signal threshold value of the physiological volume to correspond to a stomach level that is less than or equal to the stomach fullness volume； obtaining an objective measurement of the physiological volume indicative of a level of fullness of the baby's stomach； and providing an indication to the mother when the objective measurement equals or exceeds the signal threshold value. In one embodiment, for instance, the baby's swallows may be recorded for determining the volume of breast milk consumed by the baby.
