Seafood

Raw Clams

Sourced from ACOG/WHO/CDC guidelines • Updated June 2026

🔴 Avoid Entirely

Safety Status: Avoid Entirely

Raw clams are high-risk foods that must be strictly avoided during pregnancy.

According to directives from the U.S. Food and Drug Administration (FDA) and the Centers for Disease Control and Prevention (CDC), consuming raw or undercooked shellfish poses a direct risk of severe foodborne illness to pregnant individuals and can lead to pregnancy loss or fetal injury.

Clams are filter feeders, pumping large quantities of ocean water through their bodies to filter out food particles. In doing so, they also accumulate and concentrate pathogens present in the water, such as agricultural runoff, sewage, or naturally occurring coastal bacteria.

Eating them raw means ingesting these concentrated viruses and bacteria.

Primary Pathogen Risks

Raw clams can transmit several highly dangerous infections:

Hepatitis A: A highly contagious liver virus that can cause severe liver inflammation in the mother and increase the risk of preterm delivery or gestational complications.
Norovirus: Triggers acute gastroenteritis, causing severe vomiting and diarrhea. This can lead to maternal dehydration and electrolyte imbalances, potentially inducing uterine contractions and preterm labor.
Vibrio vulnificus: A bacterium found in marine environments. In pregnant individuals (who have altered immune systems), Vibrio can cause septicemia (blood poisoning), which is life-threatening for both mother and fetus.
E. coli and Salmonella: Cause severe gastrointestinal illness and high fevers, which can trigger miscarriage or fetal distress.

Safe Handling and Cooking Alternatives

Expectant mothers do not need to avoid clams entirely, provided they are cooked properly:

Boil or Steam Thoroughly: Cook clams until their shells open, then continue boiling them for an additional 4 to 9 minutes to ensure the internal temperature reaches 145°F (63°C). Discard any clams that do not open during cooking.
Safe Dishes: Enjoy dishes like New England clam chowder, linguine with red or white clam sauce, or baked clams (clams casino), provided they are prepared under hygienic conditions.

Safe Alternatives

Fully cooked clams (steamed, baked, or in chowder), cooked mussels, or cooked oysters.

OB-GYN Clinical Tip

Avoid raw clams completely. Cooking at high temperatures is the only way to destroy pathogens. Do not rely on vinegar, lemon juice, or hot sauce to sterilize raw shellfish.

⚠️ Medical Safety Note Always wash fresh fruits and vegetables thoroughly, ensure meats and seafood are cooked to recommended internal temperatures, and verify that dairy products are fully pasteurized before consumption.

Related Nutrition Guides

Core Reference

Read our complete recommendations for vitamins and safe eating:

🍎 Go to Nutrition Guide →

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Pregnancy FAQs: Raw Clams

Q1: Can I eat raw clams while pregnant?

No. Raw clams must be strictly avoided during pregnancy. They carry high risks of foodborne infections from viruses and bacteria that can lead to severe prenatal complications.

Q2: What pathogens are found in raw clams?

Raw clams can harbor Hepatitis A virus, Norovirus, and bacteria such as Vibrio vulnificus, Salmonella, and Escherichia coli (E. coli). Because clams filter water, they concentrate these pathogens inside their bodies.

Q3: Does lemon juice make raw clams safe?

No. This is a common food safety myth. Neither lemon juice, vinegar, alcohol, nor hot sauce will kill pathogens in raw clams. Only cooking to an internal temperature of 145°F (63°C) makes them safe.