What defines a newborn infant in legal terms?

In legal terms, a newborn infant is commonly defined as a child who is approximately 7 days old or younger. This specific timeframe is crucial because it aligns with the medical and legal understanding of the early stages of life, particularly concerning health, welfare, and legal rights associated with newborns. The first week of life is considered a critical period for assessing health and any potential medical concerns, and laws often reflect this unique developmental stage. Defining a newborn in this manner ensures clarity in legal situations, such as matters related to custody, health care, and the rights of the parents or guardians during that sensitive time.