Caught this The First 1000 Days: A Legacy for Life on Radio 4 this afternoon & was impressed enough to download it as a podcast (along with last week's episode on pregnancy). Basic premise is that your diet in utero & during your first years in life helps 'programme' you for life and that any major changes to your diet after that can cause problems.
DD1 was small at birth (4th percentile) and EBF for first 5 mths & then BF til almost 2 years. She followed her percentile curve for all that time & I had to strongly argue with a number of MW's against 'catch up feeding' (as it's called in the programme) of extra bottles / more high calorie snacks. Listening to this made me feel very glad I stuck to my guns - partly made easier by my mum backing me & my being skinny as a kid. Plus being part of the Southampton Women's Survey which is also looking at this sort of thing.
Do have a listen - very interesting.