Re the Lancet paper. I have a copy but have not had time to read it carefully yet. The cohort are people now in their 60's and 70's. They are the group from Hertfordshire whose Health Visitors had kept records of how they were fed ie breast or bottle during the 20's and 30's. Barker published papers some years back looking at ischaemic(sp?) heart disease with this cohort. Obvious flaws are how accurate are the records? How honest were the mothers reporting use of dummies? What were the babies fed if not breastmilk? Can we draw conclusions about breastfeeding vs current infant formulae? Certainly the researchers expected to confirm greater intelligence in those breastfed. But it wasn't there. The dummy effect remained after screening out social class etc. Would we expect a levelling out with increasing years? I don't know much about IQ tests - except for friends who don't think much of them anyway - do results remain constant, or do they change with the years? I will read the paper and try to post any words of wisdom tomorrow. Mary Broadfoot, Paisley, Scotland [log in to unmask]