For new students, the slower dances are also a great learning point, as they are steady enough to allow for catch-up time.
It is not certain if iron supplementation of children with reduced intelligence, due to iron-deficiency anemia in infancy, has any influence in allowing a "catch-up" in intellectual development.
Secondly, updates can brief you on the complete plotline or background on a particular character, so that you can get more of a catch-up experience if you are just starting to watch one of the CBS soaps for the first time.
Those babies who don't catch-up at various periods during the first three years typically continue to show developmental delays and other medical problems.
Since these infants are underweight and undersized at birth, these charts make allowances for the amount of catch-up growth that may be involved.