Pounds per square inch. The pound per square inch or, more accurately, pound-force per square inch (symbol: lbf/in2; abbreviation: psi) is a unit of pressure or of stress based on avoirdupois units. It is the pressure resulting from a force of one pound-force applied to an area of one square inch:
small for gesÂ·taÂ·tionÂ·al age. Infant whose birth weight is below the tenth percentile for gestational age. small for gestational age. SGA. 1. Term describing an infant whose birth weight is at or below the 10th percentile, as correlated with the number of weeks in utero on the intrauterine growth chart.
Large for Gestational Age (LGA) The average newborn weight is about 7 pounds 8 ounces (3,400grams). The term macrosomia is used to describe a newborn with an excessive birth weight, which literally means large body. The diagnosis of fetal macrosomia can be made only by measuring birth weight after delivery.ith about 1.5% of babies their birth weight was equal to, or was greater than 9 lb 15 oz (4500 g). Rarely do babies weigh over 10 pounds (4.6kg). Although most LGA babies are born at term (37 - 41 weeks of pregnancy), a few premature babies may be LGA.