Interesting article on a study done on rats whose mothers were fed different types of foods during pregnancy
http://news.bbc.co.uk/2/hi/health/6940852.stm
However, the final group - babies of junk-food mothers given the option of an unhealthy diet - ate the most food, eating nine days worth of food for every seven days worth consumed by the other babies on the junk food or chow menu.They ate roughly twice as much as those on the chow-only diets.
The researchers suggested that the “pleasure chemicals” released by the mother when eating fatty foods might have an effect on the developing brain of the foetus.
This links to my last article about wheat/grains being addictive… “pleasure chemicals”, scary that it goes this far too.