Final answer:
A newborn is considered a neonate until it is four weeks old. This neonatal period is characterized by the baby's adjustment to the world outside the womb, with growth and sensory development happening rapidly.
Step-by-step explanation:
A newborn is described as a neonate until it reaches the age of four weeks after birth. During this neonatal period, the newborn undergoes significant adjustments to life outside the uterus.
The term neonate, derived from neo meaning 'new' and natal meaning 'birth', refers to this critical stage in development. At birth, the neonate is adapting from the womb's environment to external conditions, requiring drastic changes, especially to their respiratory system.
The baby's senses, particularly touch and hearing, are well-developed, although vision is still maturing during this time. Growth is rapid; motor, sensory, and cognitive abilities are beginning to develop, setting the foundation for the infancy period that covers the first year after birth.