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.
Recent data (31,32) on levels of glucose, insulin and IGFBP-1 support the view that in infants born small for gestational age (SGA), insulin sensitivity is reduced in the liver but increased in the periphery. The baby was born floppy and small for gestational age, while the placenta looked calcified and pale.