It's a no-brainer that eating well during pregnancy is good for both you and your unborn child. Plenty of fresh fruits & vegetables, whole grains and proper vitamins are obvious choices.
What most of us didn't know, that fats eaten by a pregnant mother can adversely affect her child throughout their life, has now come to light through research done in the UK and published recently in the Journal of Neuroscience.
Basically, what it says, in layman terms, is that the more fats you eat during pregnancy (we're talking excess here, of course) will affect a part of the child's brain that increases appetite. This is something that has long-term effects and will influence whether a person fights obesity or not.
Please read this entire article from BBC News: http://news.bbc.co.uk/2/hi/health/7721438.stm