Is Cheese Harmful in the First Trimester?

By Maha Hommos

If you just found out you're pregnant and are now replaying the feta salad, cheese pastry, or white cheese sandwich you ate yesterday, take a breath. Cheese is one of the most misunderstood foods in early pregnancy. Some women are told to avoid all of it. Others hear that only raw milk cheese is a problem. Many assume the real danger starts later, not in the first trimester.

The reassuring truth is more balanced. Cheese itself is not harmful in early pregnancy. The real issue is listeria, a foodborne bacterium linked to certain soft or unpasteurized cheeses. Once you know which types are low risk and which ones deserve caution, the decision becomes much easier.

The short answer

Most cheese is not harmful in the first trimester if it is made from pasteurized milk, kept refrigerated, and eaten before its use-by date. Guidance from the NHS, the CDC, and ACOG agrees on the big picture. Many cheeses are safe in pregnancy, but some higher-risk cheeses should be avoided or eaten only when thoroughly cooked.

The main higher-risk categories are soft cheeses made from unpasteurized milk, mold-ripened soft cheeses such as brie and camembert, soft blue cheeses, and some fresh soft cheeses such as queso fresco type products, which the FDA says have been involved in listeria outbreaks even when labeled pasteurized.

Importantly, no major guideline treats the first trimester as an exception. The same cheese safety rules apply from the moment pregnancy is suspected.

Why cheese gets extra attention in early pregnancy

Listeria is rare, but the consequences can be serious

Cheese is not singled out because all dairy is dangerous. It gets attention because Listeria monocytogenes can survive and even grow at refrigerator temperatures, especially in high-moisture foods such as certain soft cheeses. That makes it a unique food safety concern.

Pregnancy changes the risk too. According to ACOG's patient guidance on listeria and pregnancy, pregnant women are about 10 times more likely to get listeriosis than the general population. Many women who catch it may feel only mildly ill, or may think they have a simple flu-like infection, while the bacteria can still affect the baby.

This is also why health agencies care so much about pasteurization. The FDA explains that pasteurization is designed to kill listeria and other harmful bacteria, which is why the words pasteurized milk on a cheese label matter so much in pregnancy.

The first trimester is not a safe window for risky cheese

A common myth says cheese only becomes a concern later in pregnancy. The evidence does not support that. ACOG's clinical guidance links maternal listeriosis with miscarriage, stillbirth, preterm labor, neonatal sepsis, and meningitis. A systematic review on nutrition and listeriosis in pregnancy found increased risk associated with unpasteurized dairy products, soft cheeses, and Hispanic-style cheeses.

So the question is not whether the first trimester is special. The question is whether the cheese you are eating is low risk or high risk.

Which cheeses are usually safe in the first trimester

The good news is that you do not need to give up cheese altogether.

Hard cheeses are the safest starting point

The NHS list of foods to avoid in pregnancy says hard cheeses such as cheddar and parmesan are safe, even if made with unpasteurized milk, because their low moisture makes it difficult for listeria to grow. That makes hard cheese the easiest yes for many pregnant women.

UK guidance explicitly allows some hard raw-milk cheeses because the risk is low, while CDC guidance is more cautious about raw-milk products in pregnancy. If you want one simple rule that works everywhere, choose pasteurized hard cheese.

Many pasteurized soft cheeses are fine too

ACOG notes that soft cheeses made with pasteurized milk are safe. In everyday life, that usually includes cottage cheese, cream cheese, ricotta, mozzarella, paneer, mascarpone, halloumi, and feta, as long as they are made from pasteurized milk and do not have a mold-ripened rind or blue veins.

That distinction matters. Pasteurized mozzarella on pizza or refrigerated pasteurized feta is not in the same risk category as an unpackaged homemade white cheese of unknown origin.

Better packaging usually means less uncertainty

In many Arab households and markets, fresh white cheeses may be sold loose, homemade, or prepared from milk that was never properly pasteurized. The issue is not tradition itself. It is uncertainty about milk source, hygiene, and temperature control.

If the package does not clearly say pasteurized milk, or the cheese has been sitting unrefrigerated, it is smarter to skip it during pregnancy.

If you are also trying to make sense of nutrition more broadly while preparing for pregnancy or navigating the early months, Maha Hommos's Smart Fertility Score can help you see where your habits stand, instead of guessing.

Which cheeses should be avoided, or only eaten thoroughly cooked

Unpasteurized soft and semi-soft cheeses

The CDC's food safety advice for pregnant women and ACOG's listeria guidance both advise avoiding soft cheeses made from unpasteurized milk. Common examples include brie, camembert, feta, queso blanco, queso fresco, panela, and blue-veined cheeses when they are unpasteurized.

The name of the cheese does not tell the whole story. Feta made from pasteurized milk is a different food safety situation from feta made from raw milk.

Mold-ripened soft cheeses

Brie, camembert, and goat cheese with a white rind are riskier because their texture and rind create better conditions for listeria than hard cheeses. The NHS advises avoiding mold-ripened soft cheeses unless they are cooked until steaming hot.

So if a dish contains baked brie heated right through, that is safer than eating brie cold on a cracker.

Soft blue cheeses

Blue cheeses such as gorgonzola, roquefort, and Danish blue are also considered higher risk unless they are thoroughly cooked. Again, the issue is moisture, structure, and bacterial survival, not the color alone.

Queso fresco type cheeses, even when pasteurized

This is the exception many women do not hear about. The FDA's advice for moms-to-be warns that queso fresco, queso blanco, and requeson have been linked to listeria outbreaks even when they were made with pasteurized milk. That is because contamination can happen after pasteurization, during processing or handling.

This does not mean every pasteurized soft cheese is unsafe. It means some fresh, high-moisture cheeses have a more complicated safety profile, and the guidance is deliberately cautious because the consequences can be serious.

What about common cheeses in Arab kitchens?

White brined cheese

Akkawi, Nabulsi, and similar white brined cheeses can be low risk or high risk, depending on how they were made. Treat them like any other soft cheese. If they come from a sealed, refrigerated package and clearly state pasteurized milk, they are a much better choice. If they are homemade, sold loose, or of uncertain origin, it is best to avoid them.

Halloumi

Commercial halloumi is often sold pasteurized, and when the label confirms that and it has been kept cold, it is generally a practical pregnancy choice. Because it is often cooked or grilled before eating, that adds another layer of reassurance.

Labneh and cream cheese style spreads

If they are commercially produced from pasteurized milk and kept refrigerated, they are generally lower-risk options. The danger rises with homemade dairy spreads made from raw milk or left at room temperature for long periods.

Traditional village cheese

Any traditional or homemade cheese made from unboiled or unpasteurized milk belongs in the avoid category during pregnancy, especially if you cannot verify how it was stored.

A simple cheese safety checklist for the first trimester

When you are tired, nauseated, and reading tiny labels, simple rules help. Use this checklist.

1. Check the milk source

Look for pasteurized milk on the package. If you cannot confirm it, do not assume it is safe.

2. Favor hard cheeses, or pasteurized soft cheeses without rind

Cheddar, parmesan, mozzarella, cream cheese, ricotta, and pasteurized feta are usually easier yes choices than brie, camembert, or blue cheese.

3. Be cautious with fresh market cheese

Loose white cheese from a deli counter, market stall, or home kitchen carries more uncertainty than sealed branded cheese.

4. Respect the refrigerator

Listeria can grow even in the fridge. Keep cheese cold, refrigerate it promptly, and do not leave it out on the table for long periods.

5. Watch the use-by date

Pregnancy is not the time to stretch dairy beyond the safe date just because it still smells fine.

6. Heat higher-risk cheeses thoroughly

If you choose a higher-risk cheese, eating it only when cooked until steaming hot is the safer route recommended in public health guidance.

7. When in doubt, skip it

One missed cheese board is not a nutritional loss. There are plenty of safer ways to get protein and calcium.

Is cheese useful in pregnancy, nutritionally?

Yes. Cheese can contribute protein and calcium. The goal in pregnancy is not to fear food. The goal is to choose lower-risk forms of nutritious foods.

That is why blanket advice such as never eat cheese while pregnant is not evidence-based. Public health bodies separate cheeses by risk because the processing, moisture content, and storage conditions matter more than the fact that it is cheese.

When should you call your doctor?

Contact your healthcare provider if you are pregnant, think you may have eaten a clearly high-risk cheese, and then develop symptoms such as fever, chills, muscle aches, diarrhea, or a flu-like illness. ACOG's clinical guidance notes that listeriosis symptoms in the mother can be mild, which is why medical advice matters when exposure is a real concern.

Do not panic over every bite you ate before you knew the rules. Most exposures do not lead to infection. The aim is informed caution, not constant fear.

FAQ

Can I eat feta in the first trimester?

Yes, if the feta is made from pasteurized milk and has been stored properly. Unpasteurized feta should be avoided.

Can I eat pizza with mozzarella while pregnant?

Usually yes. Pasteurized mozzarella, especially when fully heated on pizza, is generally considered safe.

Is homemade white cheese safe in pregnancy?

Only if you can verify that it was made from pasteurized or properly boiled milk and handled hygienically. If you are unsure, avoid it.

Is listeria risk only a problem later in pregnancy?

No. The same food safety rules apply throughout pregnancy, including the first trimester.

What if I already ate a cheese I was not sure about?

Do not panic. Most exposures do not cause infection. Monitor for symptoms such as fever or flu-like illness, and contact your healthcare provider if you feel unwell or if the exposure was clearly high risk.

The bottom line

Cheese is not automatically harmful in the first trimester. Many cheeses are perfectly compatible with a healthy pregnancy diet. The main concern is listeria risk from unpasteurized cheeses, mold-ripened soft cheeses, soft blue cheeses, and some fresh soft cheeses with a history of contamination.

A practical rule is simple. Choose pasteurized, packaged, well-refrigerated cheese. Avoid higher-risk soft cheeses unless they are cooked until steaming hot. Be extra cautious with homemade or loosely sold dairy products.

If you want a clearer view of how your food choices and daily habits support conception and pregnancy, Maha Hommos also offers a simple assessment that can help you identify your next best step with more confidence.

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Sources

• https://www.nhs.uk/pregnancy/keeping-well/foods-to-avoid/
• https://www.cdc.gov/food-safety/foods/pregnant-women.html
• https://www.acog.org/womens-health/faqs/listeria-and-pregnancy
• https://www.fda.gov/food/health-educators/listeria-food-safety-moms-be
• https://pmc.ncbi.nlm.nih.gov/articles/PMC6161013/
• https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2014/12/management-of-pregnant-women-with-presumptive-exposure-to-listeria-monocytogenes
• https://pregnawell.clinic/smart-fertility-score-app-104457