What seafood should pregnant women not eat

Pregnant women are not completely unable to eat seafood, but should avoid consuming high mercury fish, raw pickled seafood, allergenic shellfish, contaminated aquatic products, and spoiled seafood.

1. High Mercury Fish

Some large deep-sea fish, such as sharks, swordfish, tuna, etc., have high concentrations of methylmercury in their bodies. Mercury can affect the development of the fetal nervous system through the placental barrier, leading to cognitive impairment or motor coordination disorders. This type of risk belongs to chronic cumulative damage, and even a small amount of long-term intake may cause irreversible effects. Pregnant women should strictly avoid these high mercury risk marine fish and choose low mercury alternatives such as salmon and cod to ensure fetal safety.

2. Marinated Seafood

Seafood that is eaten raw or not thoroughly heated, such as drunken shrimp, oysters, sashimi, etc., may carry parasites, bacteria, or viruses, such as Vibrio parahaemolyticus, norovirus, and liver flukes. Pregnant women with relatively suppressed immune systems are prone to severe gastroenteritis and even sepsis after infection, which can lead to uterine contractions or premature birth. All seafood must be fully cooked at high temperatures until the center temperature meets the standard before consumption, and the consumption of raw or undercooked seafood should be avoided.

3. Allergenic shellfish

bivalves such as scallops, clams, and oysters are common allergens, and their protein structures can easily trigger maternal immune responses, manifested as rash, dyspnea, or anaphylactic shock. If a pregnant woman has a history of allergies or family allergies, ingestion may indirectly affect fetal stability through inflammatory factors. Before attempting a new species of shellfish for the first time, careful evaluation should be conducted. If symptoms such as itching and swelling occur, immediate cessation of use and medical treatment should be sought.

4. Contaminated Seafood

Seafood from areas with frequent red tide outbreaks and waters near industrial discharge outlets may contain ciguatoxin, heavy metals, or organic pollutants. These substances have strong heat resistance and cannot be decomposed by conventional cooking. Ingestion can cause neurotoxicity or liver and kidney damage. Pregnant women have increased metabolic burden, decreased detoxification ability, and are more susceptible to environmental toxins. When purchasing, attention should be paid to the origin information to avoid seafood caught from unknown sources or warning areas.

5. Deteriorated Seafood

Seafood is rich in high-quality protein and has a high moisture content, which can easily breed histamine and other spoilage products when stored improperly. Eating stale fish can lead to histamine poisoning, resulting in allergic symptoms such as facial flushing, headache, palpitations, and in severe cases, endangering the lives of both mother and baby. When purchasing, it is necessary to check the odor, color, and elasticity. Products with broken refrigerated transportation chains should not be consumed to ensure full cold chain preservation. Pregnant women should maintain a diversified daily diet, prioritizing fresh, cooked, and low mercury seafood varieties, and consuming them in moderation two to three times a week to meet their nutritional needs. Pay attention to individual physical differences, stop consuming in a timely manner if there is any discomfort, and consult a professional physician. At the same time, we should strengthen our awareness of food safety, separate raw and cooked foods, thoroughly heat them up, store them properly, and maintain a balanced diet and moderate activity to jointly maintain a healthy state during pregnancy.