Gastroenteritis. Eating spoiled food or undercooked meat can give you gastroenteritis (nausea, vomiting and diarrhea). This is bad enough when you are not pregnant but completely horrible when you are pregnant. You can become dehydrated. Rarely infections like listeria which comes from spoiled food can cause a miscarriage. This is very rare however.
Risks. Avoid deli meats, pate, unpasteurized milk & imported soft cheeses (listeria) ** things made with raw eggs (salmonella)** . Avoid alcohol (fetal alcohol syndrome) ** avoid high caffeine in beverages (^ miscarriage rate in some studies)**raw meat (coliform bacteria, toxoplasmosis, & salmonella)** & fish high in mercury.