Within a single breastfeeding session, the fat-rich milk delivered toward the end of the feeding, which satisfies the infant's appetite, is called:

1. Milk composition changes not only over weeks of lactation but also within a single feeding session. 2. Early in a feeding, watery, lactose-rich milk quenches the infant's thirst. 3. This early milk is called foremilk. 4. Toward the end of the same feeding, opaque, fat-rich hindmilk is delivered instead, satisfying the infant's appetite. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 28 "Development and Inheritance", p.1353 §Changes in the Composition of Breast Milk_