Pregnancy is a time when nutrition becomes even more crucial, not just for the mother’s health but also for the developing baby. While there are many foods that can provide essential nutrients, there are also some that should be avoided to prevent potential risks to the pregnancy.

1. Raw or Undercooked Meat: This includes rare steaks, raw sushi, and deli meats. These can contain harmful bacteria like Listeria, Salmonella, or Toxoplasma.
2. High-Mercury Fish: Shark, swordfish, king mackerel, and tilefish contain high levels of mercury which can harm the baby’s developing nervous system.
3. Raw Eggs: Avoid foods containing raw eggs like homemade mayonnaise or Caesar dressing. Raw eggs may contain Salmonella.
4. Unpasteurized Dairy Products: These can contain Listeria. Stick to pasteurized milk, cheese, and yogurt.
5. Unwashed Produce: Always wash fruits and vegetables thoroughly to remove any potential harmful bacteria.
6. Alcohol: There is no known safe amount of alcohol during pregnancy. It’s best to avoid it completely.
7. Excess Caffeine: Limit caffeine intake to 200mg per day (about one 12-ounce cup of coffee).
8. Raw Sprouts: Alfalfa, clover, radish, and mung bean sprouts may contain bacteria. Cook them thoroughly if you want to eat them.
9. Certain Herbal Teas: Some herbs can be harmful during pregnancy. Stick to pregnancy-safe teas or consult your doctor.
10. Liver and Liver Products: These contain high levels of vitamin A, which can be harmful in large doses during pregnancy.

Remember, when in doubt, always consult with your healthcare provider about your diet during pregnancy. They can provide personalized advice based on your specific health needs and circumstances.