A baby whose birthweight is significantly lower than expected given the time since conception is referred to as:

A) preterm.
B) premature.
C) low-birthweight.
D) small for gestational age.

Small for gestational age refers to a baby whose birth weight is below the 10th percentile when compared to other babies of the same gestational age. Preterm refers to a baby born before 37 weeks of gestation, while premature is another term for preterm. Low-birthweight refers to a baby weighing less than 5 pounds, 8 ounces at birth, regardless of the gestational age.