I have been wondering this for some time:
Some people/studies/whatever say that if you do CIO/CC, it raises cortisol levels and may have negative consequences on the child's brain development. Hence a number of parents opt no to go down that route for fear of damaging their children.
Now, when a LO cries a lot because of colic/reflux/wind/discomfort/whatever, surely there must be raised level of cortisol too, musn't there? Clearly, you'd expect a parent to try to comfort a colicky baby which you don't when you do CC or CIO, but nevertheless the child is still crying and still stressed.
So what's the difference on the brain, then? If none, then why concern yourself with doing CC?
(I am biased, I have done CC with DS1)
Not looking for a bun fight BTW, just curious what people's thoughts are.