Due to risk of contamination with listeria, mercury, and toxoplasmosis, certain foods should be avoided during pregnancy.
Listeria: do not eat unpasteurized soft cheeses such as brie, feta, blue, goat, or camembert. Avoid hot dogs and deli meats. Listeria can be inactivated by high temperatures, however, so any of these foods should be safe if heated until steaming hot. Do not eat smoked or raw fish.
Mercury: do not eat shark, swordfish, king mackerel, or tilefish as they contain high levels of mercury. Eat up to 12 ounces a week or lower of mercury fish and shellfish
Toxoplasmosis: Do not eat raw or undercooked meat. Also, avoid changing the cat litter and wear gloves when gardening or handling soil