A mother and her baby should breastfeed for as long as they wish to breastfeed.

The American Academy of Pediatrics currently (2005) recommends: "Pediatricians and parents should be aware that exclusive breastfeeding is sufficient to support optimal growth and development for approximately the first 6 months of life and provides continuing protection against diarrhea and respiratory tract infection. Breastfeeding should be continued for at least the first year of life and beyond for as long as mutually desired by mother and child." * As solids are introduced, usually around the middle of the first year, your baby will shift his primary source of nutrition from your milk to other foods

See :http://aappolicy.aappublications.org/cgi/content/full/pediatrics;115/2/496