Pregnant women should avoid foods like raw or undercooked meats, as these can contain harmful bacteria that increase the risk of foodborne illnesses. Unpasteurized dairy products (such as soft cheeses like Brie and feta) should also be avoided to prevent infections like listeriosis. High-mercury fish, including swordfish and king mackerel, can affect fetal brain development. Additionally, deli meats should be either avoided or thoroughly heated, as they can carry bacteria. Limit caffeine intake to one 8-ounce cup per day, and avoid alcohol altogether, as even small amounts can impact the baby’s development.