During pregnancy, what you eat directly shapes your baby’s development, and a few specific foods carry real risks worth knowing about. The good news is that the “eat” list is much longer than the “avoid” list. Most of the restrictions come down to a handful of pathogens and toxins that are more dangerous during pregnancy because your immune system is naturally suppressed.
Nutrients That Matter Most
Pregnancy increases your need for several key nutrients, sometimes dramatically. Iron requirements nearly double to 27 mg per day, up from 18 mg for non-pregnant women, because your blood volume expands significantly to support the placenta. Good sources include lean red meat, beans, lentils, spinach, and fortified cereals. Pairing iron-rich foods with something containing vitamin C (like citrus or bell peppers) helps your body absorb it.
Folate is critical for preventing neural tube defects, and the recommended intake during pregnancy is 600 micrograms per day. Most prenatal vitamins cover this, but food sources like leafy greens, fortified grains, oranges, and lentils add to your baseline. Ideally, folate intake starts before conception, since the neural tube forms in the first few weeks of pregnancy.
Calcium needs sit at 1,000 mg per day for women 19 and older (1,300 mg for teens). If you don’t get enough, your body pulls calcium from your own bones to supply the baby. Dairy products, fortified plant milks, tofu, and canned sardines with bones are all solid options. Vitamin D, which helps your body use calcium, is recommended at 15 micrograms (600 IU) per day.
Choline is one nutrient many people overlook. The recommended intake during pregnancy is 450 mg per day, and it plays a major role in your baby’s brain development. Eggs are one of the richest everyday sources. Beef, chicken, fish, dairy, beans, and cruciferous vegetables like broccoli and cauliflower also contribute.
Why Fish Is Worth Eating (With Some Exceptions)
Fish is one of the best foods you can eat during pregnancy. It provides high-quality protein and is the primary dietary source of DHA, an omega-3 fat that supports your baby’s brain and eye development. A clinical guideline published in the American Journal of Obstetrics & Gynecology recommends at least 250 mg of DHA plus EPA daily, with an additional 100 to 200 mg of DHA during pregnancy. Women with low DHA intake (under 150 mg per day) are advised to increase to 600 to 1,000 mg daily starting in the second trimester to help reduce the risk of preterm birth.
Three ounces of cooked Atlantic salmon provides about 590 mg of DHA. Herring delivers even more, at roughly 770 mg per three-ounce serving. Other excellent low-mercury options include sardines, anchovies, trout, Pacific oysters, shrimp, cod, tilapia, pollock, and catfish. The FDA considers all of these “Best Choices,” meaning you can safely eat two to three servings per week.
A smaller group of fish falls into the “Good Choice” category, where one serving per week is the guideline. These include halibut, mahi mahi, snapper, grouper, canned albacore (white) tuna, and yellowfin tuna. They have moderate mercury levels but are still safe in limited amounts.
Seven types of fish should be avoided entirely due to the highest mercury levels: shark, swordfish, king mackerel, marlin, orange roughy, bigeye tuna, and Gulf of Mexico tilefish. Mercury can damage a developing baby’s nervous system, and these species accumulate far more of it than others.
Foods to Avoid: Listeria Risks
Listeria is a type of bacteria that’s particularly dangerous during pregnancy. It can cross the placenta and cause miscarriage, stillbirth, or serious newborn infection, even if you barely feel sick yourself. The tricky part is that Listeria thrives at refrigerator temperatures, so foods that seem perfectly fine can harbor it.
The highest-risk foods include deli meats, cold cuts, hot dogs, and fermented or dry sausages that haven’t been reheated. If you want to eat deli meat, heat it until it’s steaming hot (165°F), which kills the bacteria. Refrigerated pâté and meat spreads carry the same risk.
Soft cheeses are the other major Listeria concern. Queso fresco, queso blanco, and requesón are risky whether they’re made from pasteurized or unpasteurized milk, because their high moisture content supports bacterial growth. Soft cheeses made from raw milk, such as some brie, camembert, and blue-veined varieties, also pose a risk. Hard cheeses and soft cheeses clearly labeled as pasteurized and commercially packaged are generally fine. One detail people miss: cheese sliced at a deli counter can pick up Listeria from shared equipment, so pre-packaged options are a safer bet.
Raw and Undercooked Foods
Raw or undercooked eggs can carry Salmonella. This means homemade Caesar dressing, raw cookie dough, runny yolks, and some hollandaise sauces are worth skipping unless you’re using pasteurized eggs. Most commercially produced dressings and mayonnaise use pasteurized eggs and are safe.
Raw or rare meat and poultry should be avoided. Cook all meat to its recommended internal temperature. Beyond standard bacteria like Salmonella and E. coli, undercooked meat can carry Toxoplasma, a parasite that causes toxoplasmosis. This infection can lead to serious problems for a developing baby, including brain and eye damage. The same parasite lives in soil, which is why thorough washing and peeling of all fruits and vegetables matters. Wash your hands with soap and warm water after handling raw meat, soil, sand, or unwashed produce.
Raw sushi made with fish, raw shellfish (like raw oysters from a raw bar), and ceviche all carry foodborne illness risks that are amplified during pregnancy.
Unpasteurized Drinks and Dairy
Raw (unpasteurized) milk can carry Salmonella, E. coli, Listeria, and Campylobacter. The FDA specifically warns that pregnant women who drink raw milk risk harming their baby even without feeling sick themselves. This extends to any products made from raw milk: certain artisanal cheeses, raw milk yogurt, and raw milk ice cream.
Unpasteurized juice, including fresh-squeezed juice from farm stands or juice bars, can contain harmful bacteria as well. Shelf-stable juices sold in boxes or bottles at room temperature have been pasteurized and are safe. Refrigerated fresh juices should be labeled as pasteurized; if they aren’t, skip them.
Caffeine and Alcohol
The American College of Obstetricians and Gynecologists recommends keeping caffeine under 200 mg per day, which is roughly two standard 8-ounce cups of brewed coffee. A typical 12-ounce can of cola has about 35 mg, and a shot of espresso has around 63 mg, so the limit isn’t hard to stay within if you’re paying attention. Tea, chocolate, and some medications also contribute to your daily total.
There is no known safe amount of alcohol during pregnancy. The CDC’s position is unambiguous: no type of alcohol (wine, beer, liquor) is safe, and no trimester is safer than another. Alcohol crosses the placenta freely and can affect brain development at any stage.
Liver and Vitamin A
Organ meats, especially liver, are often praised as nutrient-dense superfoods. During pregnancy, though, liver can be genuinely risky. It contains extremely high concentrations of preformed vitamin A, and excessive intake in early pregnancy is linked to birth defects affecting the heart and nervous system as well as increased miscarriage risk. The vitamin A content in liver varies wildly: a single raw chicken liver contains about 4,900 IU, while three ounces of cooked ox liver can contain nearly 60,000 IU. For context, guidelines recommend pregnant women avoid exceeding 5,000 IU of preformed vitamin A per day. Health authorities in the UK and Finland advise avoiding liver entirely during pregnancy.
Herbal Teas
Herbal teas feel like a safe, natural choice, but most haven’t been tested in clinical trials during pregnancy. The general guidance is to limit herbal tea to two cups per day. Peppermint tea is considered one of the safer options, though excessive use in early pregnancy is discouraged due to its potential effects on the uterus. Ginger tea can help with nausea, but intake should stay under 1,000 mg of ginger per day.
Chamomile tea has been associated with adverse pregnancy outcomes and is generally considered less safe. Raspberry leaf tea falls into a “use with caution” category. Fennel tea also has unresolved safety concerns. If you rely on herbal tea to replace coffee, sticking with peppermint or ginger in moderate amounts is the most cautious approach.
What a Good Pregnancy Plate Looks Like
The restrictions get a lot of attention, but the core of eating well during pregnancy is straightforward. Build meals around vegetables, fruits, whole grains, lean proteins, and healthy fats. Aim for variety: different colored vegetables provide different vitamins and minerals, and rotating your protein sources (fish, poultry, beans, eggs, lean meat) covers more nutritional ground than relying on any single one.
Two to three servings of low-mercury fish per week covers your omega-3 needs. A few eggs a day contributes meaningfully to your choline intake. Leafy greens and legumes supply folate and iron. Dairy or fortified alternatives handle calcium. A good prenatal vitamin fills gaps but works best as a safety net, not a replacement for real food.