Pregnancy turns the fridge into a quiz you didn't study for. Is the cheese okay? What about that sandwich? Sushi, obviously not — but why? The anxiety is understandable, because the stakes feel high. The reassuring reality is that the rules are short, specific, and mostly about a few well-known culprits. Once you know them, you can eat with confidence instead of squinting at every label. For the bigger picture on eating well, see our guide to what actually matters in pregnancy nutrition.
Why pregnancy raises the stakes
Your immune system shifts during pregnancy so it doesn't reject the baby — which also makes you more vulnerable to certain foodborne infections. The big one is listeria: pregnant people are about 10 times more likely to get a listeria infection than the general population, according to the CDC. Listeria can cross the placenta and cause miscarriage, stillbirth, or serious newborn illness, which is why so many of the "avoid" rules trace back to it. Knowing the why makes the list far easier to remember.
The 165°F rule (your secret weapon)
Here's the trick that makes this manageable: many "forbidden" foods become safe again if you heat them until steaming hot — to 165°F. Heat kills listeria. So the foods below aren't banned forever; they just need to be hot, not cold, right before you eat them.
Per the CDC, heat to steaming-hot (165°F) or skip:
- Deli meats, cold cuts, and hot dogs
- Dry or fermented sausages (like some salami)
- Refrigerated pâté and meat spreads
A hot, freshly grilled hot dog or a sandwich with deli turkey heated until it steams? Fine. The same meats cold from the fridge? Skip them.
Cheeses and dairy
The issue here is unpasteurized (raw) milk, which can carry listeria. So:
- Avoid soft cheeses made from unpasteurized milk — queso fresco, brie, camembert, and blue-veined cheeses are common examples
- Avoid unpasteurized milk entirely
- Hard cheeses and soft cheeses clearly labeled "made with pasteurized milk" are fine — read the label, because many brie and feta products in stores are pasteurized
When in doubt, "pasteurized" on the label is your green light.
Raw and undercooked foods
Cook these through:
- Raw or undercooked eggs — and foods that hide them, like homemade mayonnaise, some salad dressings, and raw cookie dough
- Raw or undercooked meat and poultry
- Raw or undercooked seafood — this is the sushi and oyster rule
Cooking to safe temperatures handles the bacteria and parasites these can carry.
Fish: the one to eat more of (mostly)
Here's where the advice flips from "avoid" to "please do." Fish is rich in the omega-3s and nutrients that build your baby's brain, and the EPA and FDA actively encourage it. The target:
- Eat 8–12 oz (2–3 servings) of lower-mercury fish per week. One serving is 4 oz.
"Best choices" include salmon, shrimp, pollock, canned light tuna, tilapia, cod, and sardines — all low in mercury and easy to find.
The flip side is mercury, which can harm a developing brain at high levels. Avoid the 7 highest-mercury fish entirely:
- Shark
- Swordfish
- King mackerel
- Marlin
- Orange roughy
- Bigeye tuna
- Tilefish from the Gulf of Mexico
So the rule isn't "fear fish" — it's "eat the good ones a few times a week, and skip the seven big predators."
Everyday kitchen habits
Two small habits cover a lot of ground:
- Wash produce thoroughly under running water before eating, even pre-washed bagged salads if you want to be careful
- Reheat leftovers thoroughly until steaming hot, and don't leave perishable food sitting out
When to call your provider
Most food worries resolve with a shrug and a different lunch, but call your provider if you:
- Think you ate something high-risk and then develop fever, muscle aches, chills, or flu-like symptoms — these can be signs of a listeria infection and are worth a prompt call
- Have persistent vomiting or diarrhea that risks dehydration
- Are unsure whether a specific food was safe and it's nagging at you — a quick question beats days of worry
The bottom line
You don't have to live in fear of your fridge. Heat risky meats to 165°F, choose pasteurized dairy, cook eggs and seafood through, and eat 2–3 servings of lower-mercury fish a week while skipping the seven big ones. That's almost the whole game. Everything else, you can enjoy — and a well-fed, well-nourished you is exactly what your baby needs.