The term small for gestational age refers to a neonate that:

• A. Fails to reach both weight and in utero growth potential.
• B. Fails to reach in utero growth potential
• C. Is born at less than a prespecified weight percentile without consideration to in utero growth potential.
• D. Is born at less than the 5th percentile for weight

Answer: (C)

Small for gestational age is defined by birth weight below a predetermined percentile for the baby's gestational age, using a population standard. This criterion looks at how the baby’s weight compares to peers at the same gestational age and does not consider whether the fetus reached its in utero growth potential. That’s why a baby can be smaller than expected for their age yet have normal growth potential (constitutionally small) and still be classified as SGA. In contrast, fetal growth restriction refers to not achieving growth potential, which is a different concept. The common cutoffs are percentile-based (often the 10th percentile), not fixed at a specific percentile like the 5th, and not defined solely by failure to reach growth potential. Hence, the best description is: born at less than a prespecified weight percentile for gestational age, without regard to in utero growth potential.