For Clinical Purposes,preterm and Post-Term Infants Are Defined As

For clinical purposes,preterm and post-term infants are defined as:

A) Preterm before 34 weeks if appropriate for gestational age (AGA) and before 37 weeks if small for gestational age (SGA) .
B) Post-term after 40 weeks if large for gestational age (LGA) and beyond 42 weeks if AGA.
C) Preterm before 37 weeks, and post-term beyond 42 weeks, no matter the size for gestational age at birth.
D) Preterm, SGA before 38 to 40 weeks, and post-term, LGA beyond 40 to 42 weeks.