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.
What is considered the normal weight for a newborn? The normal weight of a baby who reaches full term between 37 and 40 weeks is 2.7â4.1kg (6 â 9 lbs), with an average weight of 3.5kg (7.7 lbs). A baby who weighs less than 2.5kg (5.5 lbs) is considered to have a low birth weight.bout half of all twins and 90% of all triplets are born prematurely, before 37 weeks, and have a low birth weight of under 2.5kg. A baby who weighs more than 4kg (8.8lbs) at birth may be referred to as macrosomia, which means the baby is larger than normal.