In the United States, a graduate from an accredited PA program must pass the NCCPA-administered Physician Assistant National Certifying Exam before becoming a PA-C; this certification is required for licensure in all states.
Small for gestational age (SGA) babies are those whose birth weight lies below the 10th percentile for that gestational age. Low birth weight (LBW), is sometimes used to define a baby that weighs less than 5 lb 8 oz (2500 g) regardless of gestational age.
Percentile - The weighted percentile method. 1  In addition to the percentile function, there is also a weighted percentile, where the percentage in the total weight is counted instead of the total number. There is no standard function for a weighted percentile.