When it happens · 4 min read
What not to eat in pregnancy, and why
The food list gets handed over with no explanation, which makes it feel arbitrary and impossible to remember. It's much easier once you know it's mostly about one organism.
Last updated August 9, 2026
The reason: listeria
Listeria is a bacterium that survives refrigeration — which is what makes it different from most food-safety risks, since chilling doesn't help. The CDC states that pregnant people are about 10 times more likely to get a listeria infection, and in pregnancy it can cross the placenta and cause serious harm even when the illness in you is mild.
That's the whole logic behind the list: it targets foods that are eaten cold, stored a long time, or unpasteurised.
The actual list
Unpasteurised milk and soft cheeses made from it — brie, camembert, feta, blue-veined, queso fresco — unless the label says pasteurised. Unheated deli meats, cold cuts, hot dogs, and fermented or dry sausages. Refrigerated pâté, meat spreads, and smoked seafood. Raw or undercooked meat, poultry, eggs, and shellfish. Raw sprouts. Unwashed fruit and vegetables. Unpasteurised juice.
The deli meat nuance is worth repeating because it's the most misunderstood: heating it until steaming hot kills listeria, so a hot sandwich is fine while a cold one isn't.
Fish is a separate question
Fish restrictions are about mercury, not bacteria, and the guidance is often misread as eat less fish. It isn't — fish is genuinely good for fetal brain development, and the advice is to eat a couple of servings a week of low-mercury options: salmon, sardines, cod, tilapia, canned light tuna, shrimp.
What to avoid: shark, swordfish, king mackerel, tilefish, marlin, orange roughy, and bigeye tuna. Raw fish and sushi fall under the raw-seafood rule rather than the mercury one — cooked sushi rolls are fine.
If you've already eaten something
The risk from a single exposure is low, and most people who eat something on the list are fine. Don't spiral about a sandwich from last Tuesday. What matters is what to watch for: fever, chills, muscle aches, or flu-like symptoms in the following weeks. If those appear, tell your provider what you ate and when — listeriosis is treatable with antibiotics, and knowing the exposure speeds the diagnosis.
Common questions
- Is all soft cheese out?
- No — soft cheese made from pasteurised milk is fine, and most supermarket versions are pasteurised. Read the label rather than avoiding the whole category.
- What about eggs?
- Cook until both white and yolk are firm, or use pasteurised eggs — that covers homemade mayonnaise, mousse, and cookie dough, which are the usual hidden sources of raw egg.
- How careful do I need to be with leftovers?
- Reheat until steaming, don't keep them longer than a few days, and keep your fridge properly cold. Listeria's ability to grow at fridge temperature is exactly why long-stored ready-to-eat food is the risky category.
If it's this, not that
Still not sure
This page is the general answer. Yours is a specific child.
The advisor can be. It has read everything here, and it knows how old your children actually are — which is the whole difference wherever guidance changes with age. Ask it anything.
- She's got a temperature of 100. Is that something to worry about?
- He's obsessed with space and galaxies — what toys are worth getting him?
Free. It comes with the note.
It answers from the same cited pages you are reading, and when the question is where to go, from the real clinician, hospital and childcare records behind this site — not a link to go search them yourself. It says so when we have not written about something, and it is not a doctor; for anything urgent it gives you the threshold and tells you to call.
Where this comes from
Every claim on this page traces to one of these. See every source we use →
Written from the sources named above, and it is not a substitute for your own doctor. If something feels wrong to you, that instinct is a good enough reason to call — you know yourself and this family better than any page does.