Question

For clinical purposes preterm and postterm infants are defined as:

a. Preterm before 34 weeks if appropriate for gestational age (AGA); before 37 weeks if small for gestational age (SGA).
b. Postterm after 40 weeks if large for gestational age (LGA); beyond 42 weeks if AGA.
c. Preterm before 37 weeks, postterm beyond 42 weeks, no matter the size for gestational age at birth.
d. Preterm, SGA before 38 to 40 weeks; postterm, LGA beyond 40 to 42 weeks.

Answer 1

Preterm and postterm infants are defined based on their gestational age and birth weight. The criteria for classification differ based on whether the infant is AGA, SGA, or LGA.

Step-by-step explanation:

Preterm and postterm infants are defined based on their gestational age and birth weight. Preterm infants are those born before 37 weeks of gestation, while postterm infants are those born beyond 42 weeks. The specific criteria for preterm and postterm classification differ based on whether the infant is appropriate for gestational age (AGA), small for gestational age (SGA), or large for gestational age (LGA).

For AGA infants, preterm is before 34 weeks and postterm is after 40 weeks. For SGA infants, preterm is before 37 weeks and postterm is beyond 42 weeks. For LGA infants, preterm is before 37 weeks and postterm is beyond 40 to 42 weeks.