A large, population-based representative study (n = 3656) has shown th
at the vast majority of healthy, full-term, singleton infants born sma
ll for gestational age (SGA) achieve catch-up growth during the first
2 years of life. Indeed, most of the increase in height SDS occurs by
2 months of age. Children born SGA who do not show postnatal catch-up
growth and so remain short at 2 years of age, have a higher risk of sh
ort stature (< -2 SDS) in later-life, with a relative risk at 18 years
of age of 5.2 if born light and of 7.1 if born short.