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What do these developmental studies really mean?
- If your child was formula fed and scored
105 on a test of cognitive development,
then your child might have scored 107 to
109 had he or she been breast fed for the optimal
duration.
- If every child was optimally breast-fed,
the mean developmental test score of the population might
rise 2 to 4 points.
- Most of these studies show that
breastfeeding up to four to eight months of age,
with the addition of supplemental foods at 4 to 6 months,
seems to be optimal.
- There are very few studies that have examined
whether breast feeding longer than four to eight months
might be better.
The study by Mortensen on the effect of breastfeeding on developmental
test scores on Danish young adults showed that mean developmental test
scores increased significantly as breastfeeding duration increased from
< 1 month, through 2-3 months, 4-5 months, to 7-9 months. There was a
small non-significant decrease in developmental test scores when
breastfeeding continued for > 9 months. (
Mortensen, 2002
).
- No difference in the motor skills of infants
fed formula or breast milk has been observed or reported.
- It has been postulated that
breastfeeding mothers provide more
attention and stimulation to their babies and that this could explain
their better developmental test scores.
All of the authors have attempted to account for this in their
data analysis by various means.
The similarity of the results of these studies
supports the conclusion that breast milk improves
developmental outcome.
The Jacobson study found that the difference in developmental
test scores between breast fed and formula fed infants
disappeared when maternal test scores and parenting skills were controlled
(
Jacobson, 1999
).
- This data is very thought provoking, however it does not prove
that breastfeeding one's baby will guarantee a smarter child.
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