birth and infancy
type: Concept
narrower: preterm infants

concepts
type: Collection
type: ConceptGroup
member: preterm infants

preterm infants
type: Concept
broader: birth and infancy
definition: In comparison with infants born at 40 weeks, the expected length of pregnancy, infants born before they have reached 37 weeks’ gestation are considered premature. About one of eight infants, or 12%, is born premature in the United States, resulting in more than 485,000 preterm births. [Source: Encyclopedia of Human Development; Preterm Infants]