Disease

Nutrition During Pregnancy

Learn about nutrition during pregnancy: essential nutrients, foods to eat and avoid, weight gain guidelines, and safe supplementation.

Overview

Nutrition during pregnancy plays a critical role in fetal growth, brain development, and the long-term health of both parent and child. Caloric needs increase modestly, by about 300 to 450 extra calories per day in the second and third trimesters, but the need for many vitamins and minerals rises significantly. Key nutrients include folic acid to prevent neural tube defects, iron to support increased blood volume, calcium and vitamin D for fetal bone development, DHA for brain and eye development, and protein for tissue growth. Equally important is knowing which foods to avoid, such as raw or undercooked seafood, unpasteurized dairy, deli meats, high-mercury fish, and excess caffeine or alcohol. Following evidence-based guidelines helps reduce the risk of complications and supports a healthy birth weight.

Common Symptoms

Increased appetite and food cravings
Food aversions, especially to meat or strong-smelling foods
Heartburn and acid reflux after meals
Constipation due to iron supplements and hormonal changes
Nausea that can limit food tolerance
Heightened sense of smell affecting food choices
Swelling related to high sodium intake
Fatigue linked to low iron or inadequate calories

Risk Factors

Pre-existing nutrient deficiencies such as anemia or low vitamin D

Vegetarian, vegan, or highly restrictive diets

Multiple pregnancy, which requires higher nutrient intake

Adolescent pregnancy, where the parent is still growing

Food insecurity or limited access to fresh foods

History of eating disorders

Excessive caffeine or alcohol consumption

Gestational diabetes requiring dietary control

Lifestyle Tips

Take a daily prenatal vitamin with 400 to 800 mcg of folic acid throughout pregnancy

Include at least 27 mg of iron daily from lean meats, legumes, and fortified grains

Eat 2 to 3 servings of low-mercury fish such as salmon or sardines per week for DHA

Aim for 1,000 mg of calcium daily from dairy, fortified plant milks, or leafy greens

Stay hydrated with at least 8 to 10 glasses of water daily

Avoid raw fish, unpasteurized cheese, deli meats, and high-mercury fish

Limit caffeine to 200 mg per day (about one 12-ounce coffee)

Choose whole grains, fruits, and vegetables to manage constipation and blood sugar

When to Seek Medical Care

Consult your healthcare provider or a registered dietitian if you experience persistent vomiting that prevents adequate nutrition, rapid or inadequate weight gain, signs of anemia such as severe fatigue or paleness, or cravings for non-food items such as ice, clay, or starch (a condition called pica). Seek urgent care for signs of foodborne illness including fever, diarrhea, or dehydration after eating suspect foods.

Related Conditions

Gestational Diabetes Anemia Preeclampsia

Related Symptoms

Nausea Fatigue Heartburn

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