Newborn: Meaning, Development, Care, and Medical Usage
A newborn is a baby in the earliest period after birth, usually the first 28 days, when breathing, feeding, circulation, and temperature control rapidly adapt.
Infancy: Meaning, Development, Care, and Early Growth
Infancy is the earliest stage of childhood, marked by rapid growth, brain development, attachment, communication, movement, feeding, and complete dependence on caregivers.