page_title: Infant
section_title: Physical characteristics of newborns
hierarchical_section_title: Infant / Physical characteristics of newborns
caption_attribution_description: A human male baby, crying. The baby is only a few days old and still adjusting to life outside of the womb.
context_page_description: An infant is the more formal or specialised synonym for "baby", the very young offspring of a human. The term may also be used to refer to juveniles of other organisms.
  A newborn is, in colloquial use, an infant who is only hours, days, or up to one month old. In medical contexts, newborn or neonate refers to an infant in the first 28 days after birth; the term applies to premature, full term, and postmature infants; before birth, the term "fetus" is used. The term "infant" is typically applied to young children under one year of age; however, definitions may vary and may include children up to two years of age. When a human child learns to walk, the term "toddler" may be used instead.
  In British English, an infant school is for children aged between four and seven. As a legal term, "infancy" continues from birth until age 18.
context_section_description: A newborn's shoulders and hips are wide, the abdomen protrudes slightly, and the arms and legs are relatively long with respect to the rest of their body.
caption: A crying newborn, a few days after birth
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