Final answer:
The composition of breast milk changes during the first days of lactation and within a single feeding. It starts with colostrum, followed by transitional milk, and then mature milk. Mature breast milk provides nutrients and immunoglobulins for the baby's development and protection against infections.
Step-by-step explanation:
The composition of breast milk changes during the first days of lactation and within a single feeding.
In the final weeks of pregnancy, colostrum, a thick, yellowish substance high in protein but low in fat and glucose, is produced.
After childbirth, transitional milk is secreted, followed by mature milk.
Mature breast milk contains nutrients for the baby's development and growth, as well as immunoglobulins to protect against infections.