Mia, welcome !

 I found the WHO publication, 'INFANT FEEDING, The Physiological Basis', helpful
on this topic. Chapter 4 is the one on the development of the infant and
complementary feeding. It discusses short term risks and long term.
For example, and I quote
' the introduction of cereals, and particularly vegetables, can interfere with
the absorption of breast-milk iron... '
Have these peds heard of the Innocenti Declaration ? ...human milk to be the
main source of nourishment for two years or beyond .. 'Breastmilk is the only
standard food for the human infant' ...'complementary foods pregressively
replace breast milk, which is a complete and balanced food.' You can see then,
that it is not a good idea to add things until the baby is growing more slowly
and can *afford* to fit them in...they take up room in the stomach...
Helena Boutal