Final answer:
Exclusive breastfeeding is recommended for the first 6 months of life. Colostrum is the initial immune-rich milk, and the milk supply adjusts to the baby's needs.
Step-by-step explanation:
Exclusive breastfeeding is recommended for about the first 6 months of a baby's life, after which other foods and liquids can be introduced while continuing to breastfeed. During the early weeks, the milk supply adjusts to the infant's demand, with an average production of 1.5 liters of milk per day for a single infant. Colostrum, the first milk produced after childbirth, is rich in immunoglobulins providing essential immunity defenses for the newborn during the initial days of lactation. Eventually, as lactation continues, there is a transition to mature milk that contains the optimal balance of nutrients for the infant.