At some point during nursing the baby or the mother may want to wean from breastfeeding. Among infants less than 6 months of age the weaning has most likely been initiated by the mother. This can be for many reasons. Most often, it is because the mother is returning to work.
Infants start to wean when they are given anything other than breast milk.
Weaning can be accomplished any number of ways, depending on your circumstances. Most breastfeeding supporters suggest a gradual weaning whenever possible. It's easier for both mother and infant. Some situations, however, may require a faster approach. The use of medication to stop milk production is no longer recommended.