Seafood During Pregnancy: Balancing Nutrition

Is it safe to eat fish during pregnancy?

Fish supplies protein and nutrients such as long-chain omega-3 fatty acids. The US Food and Drug Administration and Environmental Protection Agency advise people who are pregnant or breastfeeding to eat 8 to 12 ounces per week of a variety of seafood choices lower in mercury. Examples include salmon, sardines, shrimp, and trout. Recommendations differ by country, so local food-safety guidance should take precedence.

Mercury exposure is the reason for choosing species carefully: methylmercury can affect the developing nervous system. FDA and EPA guidance advises avoiding fish with the highest mercury levels, including shark, swordfish, king mackerel, marlin, orange roughy, Gulf of Mexico tilefish, and bigeye tuna. For fish caught recreationally, check local advisories; if none are available, the agencies recommend limiting the meal and avoiding other fish that week.

Can eating fish prevent preeclampsia?

Preeclampsia is a pregnancy complication involving new high blood pressure, usually after 20 weeks of pregnancy, and signs that organs may be affected. Researchers have investigated whether diet, including fish intake before and during pregnancy, is associated with hypertensive disorders. Observational studies can identify patterns, but they cannot by themselves prove that a food caused a change in risk; diet quality, income, health conditions, and other factors may influence results.

People should not increase fish intake or take fish-oil supplements specifically to prevent preeclampsia without advice from a clinician. Prenatal care includes monitoring blood pressure and assessing individual risk. Contact a healthcare professional promptly about concerning symptoms such as severe or persistent headache, vision changes, or upper abdominal pain, and seek urgent care for severe symptoms.

How can pregnant people choose and prepare seafood safely?

Variety helps avoid relying heavily on one species and reduces the chance of repeated exposure to contaminants concentrated in particular fish. Check the FDA and EPA’s current fish advice when selecting seafood, and consult local health departments about fish caught in nearby waters. Pregnant people should avoid raw or undercooked seafood because it can carry germs that cause foodborne illness.

Food guidance supports a balanced diet; it does not replace individualized prenatal care. Discuss seafood choices with a clinician if you have an allergy, follow a restricted diet, or have questions about supplements. Fish-oil products vary, and supplements do not provide all the same nutrients as whole seafood.