What is a typical feature of a small-for-gestational-age (SGA) newborn that differentiates it from a preterm baby with a low-birth-weight

Gestational age was calculated from the report of the mother's last normal menstrual period (LMP), and preterm delivery was defined as delivery at <37 completed weeks of gestation. SGA was defined as birth weight <10. percentile for gestational age and gender using INTERGROWTH standards

What is Small for gestational age?

Small for gestational age (SGA) is defined as a birth weight less than the 10th percentile for gestational age. SGA children are divided into two main groups: constitutionally normal children who are SGA and children who are SGA due to growth restriction with a birth weight below the expected optimal birth weight. Constitutionally normal infants have a normal birth weight less than the 10th percentile due to inherent factors such as maternal height, weight, ethnicity, parity, and these infants are not at increased risk of perinatal mortality and morbidity. SGA and fetal growth restriction (FGR) are used interchangeably but are not synonymous. Many SGA infants have FGR, and many FGR infants are also SGA. However, SGA cannot be used as a marker for FGR because some infants with FGR will have a birth weight greater than the 10th percentile. Therefore, when differentiating between SGA and FGR, it is important to use fetal growth curves adjusted based on constitutional factors to differentiate normal SGA infants from those with FGR. In this article, we focused on infants with SGA secondary to FGR (FGR SGA)

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