In terms of FASD, growth deficiency is defined as significantly below average height, weight or both due to prenatal alcohol exposure, and can be assessed at any point in the lifespan. Growth measurements must be adjusted for parental height, gestational age (for a premature infant), and other postnatal insults (e.g., poor nutrition), although birth height and weight are the preferred measurements.[1] Deficiencies are documented when height or weight falls at or below the 10th percentile of standardized growth charts appropriate to the population.[21] Prenatal or postnatal presentation of growth deficits can occur, but are most often postnatal.[22]