The growth of 90 infants of low birthweight (1500–2499 g) has been studied longitudinally from birth to 2 years of age. Seventy‐five per cent of those infants were of birthweight that was appropriate‐for‐gestational age (AGA) and of mean gestational age 33.6 weeks (boys) and 34.5 weeks (girls). Twenty‐four per cent were small‐for‐gestational age (SGA) and of mean gestational age 39.4 weeks (boys) and 38.5 weeks (girls). The data showed that, when gestational age was considered, the growth of AGA infants was similar to that of full‐term infants of normal birthweight; SGA infants displayed accelerated growth (‘catch‐up’), particularly in the first months of life with upward percentile crossing from below the 5th toward the 50th. These results provide further evidence of the need to consider gestational age and whether AGA or SGA when assessing the growth of low birthweight infants.
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