A premature infant may be classified based on weight and gestational age at birth.
(1) absolute birthweight
(2) weeks gestation
(3) percent birthweight for gestational age
Birth Weight in Grams
< 1,000 grams
extremely low birth weight
1,000 - 1,499
very low birth weight
1,500 - 2,499
low birth weight
• According to Conry, the mean birth weight at 35 weeks is 2,500 grams and at 37 weeks is 2,870 grams.
< 38 weeks
38 - 42 weeks
> 42 weeks
Percent Birth Weight for Gestational Age
small for gestational age (SGA)
10 - 90%
appropriate for gestational age (AGA)
large for gestational age (LGA)
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