What to Eat During Pregnancy: Foods to Embrace and Avoid
Evidence-based guide to pregnancy nutrition covering essential nutrients, safe foods, and what to avoid based on FDA and WHO guidelines.
Pregnancy increases caloric needs by only 300 to 500 extra calories per day in the second and third trimesters, but the demand for specific micronutrients rises dramatically. The World Health Organization recommends that pregnant people consume at least 27 mg of iron daily, nearly double the non-pregnant recommendation of 18 mg.
Essential Nutrients and Their Best Food Sources
Folate is critical in the first 28 days post-conception, when the neural tube forms. The CDC recommends 400 to 800 mcg of folic acid daily. Dark leafy greens like spinach provide 263 mcg per cooked cup, while lentils deliver 358 mcg per cooked cup, making them two of the best dietary sources.
- Folate: lentils, spinach, asparagus, fortified cereals
- Iron: lean red meat, tofu, kidney beans, fortified grains
- Calcium: dairy, fortified plant milks, bok choy, almonds
- Omega-3 DHA: low-mercury fish like salmon, sardines, trout
- Iodine: seaweed, dairy, eggs, iodized salt
Foods to Embrace Every Week
Salmon is one of the most nutrient-dense choices during pregnancy. A 3-ounce serving provides approximately 1,500 mg of DHA, which supports fetal brain and eye development. The FDA classifies salmon as a "best choice" fish and recommends 2 to 3 servings per week for pregnant people.
Eggs supply choline, a nutrient 90 percent of Americans consume at insufficient levels. The American Medical Association recommends 450 mg of choline daily during pregnancy; two large eggs provide 294 mg. Whole grains, legumes, and colorful vegetables round out a complete pregnancy diet.
Foods and Substances to Avoid
High-mercury fish such as shark, swordfish, king mackerel, and tilefish should be completely eliminated. The FDA reports that mercury in these species can damage a developing nervous system. Additionally, raw or undercooked meat, unpasteurized cheeses, and deli meats carry listeria risk, which is 10 times higher in pregnant people than the general population.
Caffeine intake should be limited to under 200 mg per day during pregnancy, according to ACOG. A standard 8-ounce cup of brewed coffee contains approximately 95 mg, so two cups per day is the maximum safe limit.
Managing Food Aversions and Cravings
Food aversions affect up to 75 percent of pregnant people, most commonly in the first trimester. A 2014 study in Ecology of Food and Nutrition found that the most common cravings globally are for sweet, salty, and starchy foods. Cravings are not direct indicators of nutritional deficiency, but persistent non-food cravings (pica) should be reported to a healthcare provider.
- Eat smaller, more frequent meals to manage nausea and blood sugar
- Pair iron-rich foods with vitamin C sources to boost absorption by up to 67 percent
- Stay hydrated with at least 10 cups (2.3 liters) of water daily
- Choose whole-grain carbohydrates over refined ones to support stable energy
Conclusion
A well-planned pregnancy diet does not require perfection, but it does require consistency with key nutrients. Focus on folate, iron, calcium, DHA, and iodine. Avoid the highest-risk foods with confidence, and consult a registered dietitian if managing a restrictive diet or medical condition during pregnancy.