Naturally, the mother is the best source of nutrition for most babies. (myorganicformula.com)
Since it is recommended that breast milk or formula be the main source of nutrition for babies until age one; many people think of that age as the time to make the change. (breastfeedingneeds.com)
This method still uses breast milk as the primary source of nutrition for infants under six months, but it usually is combined with other liquids and food. (onlinedegrees.bradley.edu)