الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
Summary & Conclusion
88
SUMMARy
1- Mean PRA in breast fed infants aged 4-10 months was
not significantly different from bottle fed . but infants fed on
similac had significantly lower PRAthan those fed SMAformula.
2-Mean plasma aldosterone showed the same relatlonship .
3- Urinary sodium excretion in breast fed was not
significantly different from the farmula fed. still infants on
similac has sigificantly higher sodium excretion rates compared
to those infants on SMA formula. and there was a correlation
between urinary sodium and PRAand PAldo.
4- There was a significant correlation between PRA and
Aldosterone in the three groups.
5- In relation to age. with PRA and PAldo. there was no
sigificant correlation observed in the breast fed. but in bottle fed
the hormonal levels showed a significant decrease with age.
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Summary & Conclusion
89
CONCLUSION
The maturation of the mineralo corticoids system ” plasma
aldosterone - renin - angiotensin system ” is different in breast
fed compared to formula fed infants .
Infants fed on formula showed an earlier decline in the PRA
and PALdlevel which occur in both the low sodium and the high
sodium formula fed infants. The earlier decline was shown in
the high sodium excretion group to be independent of PRA and
PAId levels.
It appears that the sensetivity of the PRA and PAId to
sodium levels as a part of the heamostatic control mechanisms
develops during infancy and is affected by the type of feeding
during this period. The role of the breast feeding. in aiding to
this maturational process is linked to absence of a correlation
between age and PRA and PAId during infancy. The mechanism
by which the latter finding is aided is not clearly defined.
Whether prostag landins or other factors known to affect the
Renin - Aldosterone.
Angiotensin system exit in breast milk and playa role in the
above findings remains to be investigated .