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.
Ounces and pounds are the units used to measure newborns in the United States. In most other countries, the metric system is used, and birth weights are described in kilograms. There are 16 ounces in each pound and 1,000 grams in a kilogram. The average birth weight of a baby is 7 pounds and 8 ounces, or approximately 3.5 kilograms. As a reference, a developing fetus reaches a weight of 20 grams between the 12th and 13th week of gestation.