Thinking about the BMJ article about 'intelligence' and breastfeeding,  
it occurs to me that there would be very few babies in an exclusively  
breastfed group who were left alone on a sofa or bed with their milk  
source propped on a pillow so as not to fall out of their mouths.

So, would you say it was some confounding factor like income or  
educational level that makes breastfed babies less likely to be left  
alone while they feed, or would you consider the possibility that it  
is directly related to the breastfeeding itself?

I'm sure there are statisticians for whom this would be a question to  
be pondered over at length, but probably not many people who've ever  
watched babies feeding.

Of coures, to test whether it's the milk or the feeding you would need  
an astronomical number of babies being fed breastmilk substitutes at  
the breast, to compare with babies getting breastfed the more usual way.

Rachel Myr
Kristiansand, Norway

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