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.
My first child was 110 percentile in weight in her fist year...she was and is a healthy child (all my children are healthy for that matter) however if your concern with the baby not getting adequate nourishment you should talk to your doctor.