I had a thread running yesterday about my six month old son who has positional plagiocephaly (flat head syndrome). This is inspired by a comment on there of a private practice midwife who talks to expectant parents about prevention of plagiocephaly. This is something I wish I had learnt about at NCT rather than all the pregnancy bits which were pretty irrelevant seeing as I was 8 months pregnant already.
There are other things I wish I had learnt about too. I spent money on an expensive electric steraliser and it was awful. I ended up with a £10 Milton bucket which I love. Granted I may have made the same choice again, but what do you wish you'd learnt in antenatal rather than what you did (I didn't do the NHS ones so can't say whether it was covered there or not!).