Diamond - I actually had a look for it as I was writing that reply but I can't figure out where it was

As one of my mum's friends said - all these things are just a way to help the numbers come out the way you want - they're not a guarantee - she did everything right during her pregnancy and her daughter was born at 28 weeks, and has cerebral palsy and a heart problem - then there are other mums at my brother's school that we all shook our heads at while watching them smoke with their big preggy bellies - and they both had healthy full-term babies. So there's no point beating yourself up about one or two tiny things like a cup of tea a day - just do the best you can.