World Cancer Research Fund- American Institute for Cancer Research : Diet, nutrition, physical activity and colorectal cancer - 2017World Cancer Research Fund- American Institute for Cancer Research : Diet, nutrition, physical activity and Breast CancerFoods safety for pregnant women – USDA - www.usda.govPosition of the American Dietetic Association 2008 e Position of Accademy of Nutrition and Dietetics 2014:Nutrition an lifestyle for a healthy pregnancy outcomInstitute of Medicine. Nutrition during pregnancy. Washington DC. National Academic Press 1990 – Revisione 2009