The recommendation from American Academy of Pediatrics (AAP) regarding breastfeeding is:
Babies should be exclusively breastfed for 6 months and then transitioned to formula.
Babies should be exclusively breastfed for 6 months and then transitioned to whole milk and solids.
Babies should be exclusively breastfed for 6 months and then solids should be introduced while continuing to breastfeed for 12 months or longer.
Babies should be exclusively breastfed for 3 months and then transitioned over to formula.