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.
In 2004, a revised certificate of live birth was implemented. This led to a major modification in the SCAN birth module. The changes in the birth certificates may also affect comparisons of variables to previous years. Birthweight-The weight of a fetus or neonate determined immediately after delivery or as soon as possible thereafter (expressed to the nearest gram). Very Low Birthweight-Weight at birth which is less than 1,500 grams (3 pounds, 4 ounces), regardless of the period of gestation.