(Less than 1.66 pounds is considered extremely low birth weight; less than 3.31 pounds is labeled very low birth weight
Out of these LBW neonates, 11 (10.2%) were classified as very low birth weight
and 8 (0.2%) as extremely low birthweight.
Approximately 63,000 infants are born in the United States with a very low birth weight
(one to five percent of all live births).
The study found that adults with very low birth weight
scored lower or performed slower in general intelligence, executive functioning and attention and visual memory compared to the adults born at a low to normal weight.
The prevalence of low birth weight and very low birth weight
did not change (12% and 2-3%, respectively), but the second birth was more likely than the first to be preterm (15% vs.
There is some evidence of reduced linear growth and increased risk of rickets in very low birth weight
infants fed unsupplemented human milk (23,24).
Low birth weight was defined as < 2,500 g, and very low birth weight
as < 1,500 g.
The authors said that very low birth weight
clearly affected children's later intellectual and academic performance.
In addition, it has documented a significantly reduced incidence of low birth weight and very low birth weight
deliveries compared to the national average (5.1 percent and 0.71 percent compared to 7.08 percent and 1.3 percent respectively).
A group of 20 very low birth weight
babies were fed either breast milk or commercial formula.
There were 45.5% low birth weight with 4.28% very low birth weight
babies among cases.
For the study, 103 adults born with a very low birth weight
(less than 3.3 pounds) and 105 adults who weighed more than 3.3 pounds at the time of birth were given tests that measured their thinking skills, including vocabulary, ability to understand words, memory and IQ.