Can I Eat Prawns When Pregnant?

Yes — prawns are safe to eat during pregnancy, provided they are properly cooked. Prawns are a nutritious source of protein and iodine, and they appear on no NHS list of foods to avoid in pregnancy. The key rule is the same as with all shellfish: they must be thoroughly cooked and served hot before you eat them.

Quick Answer

Prawns in pregnancy: Yes — cooked prawns are safe; avoid raw or cold pre-cooked prawns if not kept safely chilled

Hot, freshly cooked prawns are safe throughout pregnancy. Pre-cooked chilled prawns (such as those bought from a supermarket) are also safe if they are within their use-by date and have been stored correctly. The risk comes from raw or improperly stored shellfish, which can harbour harmful bacteria.

Are Prawns Safe in Pregnancy?

Yes — cooked prawns are safe in pregnancy. The concern with shellfish during pregnancy is bacterial and viral contamination. Raw shellfish, including raw prawns, can carry bacteria such as *Listeria*, *Vibrio*, and *Salmonella*, as well as viruses like norovirus. These pathogens are destroyed by thorough cooking, which is why properly cooked prawns carry no meaningful risk.

Listeria is the most significant concern from a pregnancy perspective. It can cross the placenta and, in rare cases, cause serious illness in the baby. However, listeria is killed by heat, so thoroughly cooked prawns are not a listeria risk. The risk comes from cold or raw shellfish that has been stored at incorrect temperatures or that was not cooked before being chilled.

Pre-cooked prawns sold in supermarkets — the cold, pink, shell-off variety often used in sandwiches and prawn cocktails — are safe in pregnancy if they have been stored correctly in the fridge, are within their use-by date, and you eat them promptly after purchase. They were cooked during processing, so they are not raw. The key is that they must have been kept cold throughout and not left at room temperature.

NHS Guidance on Prawns in Pregnancy

The NHS does not list prawns as a food to avoid in pregnancy. Cooked shellfish, including prawns, is considered safe to eat during pregnancy. The NHS does advise avoiding raw shellfish (such as raw oysters or clams), as these have not been cooked and therefore carry a risk of bacterial or viral contamination. This advice does not apply to cooked prawns.

The NHS also emphasises general food safety principles during pregnancy: check use-by dates, store seafood properly in the fridge, and do not eat anything that smells off or has been left at room temperature for an extended period.

How to Eat Prawns Safely in Pregnancy

Follow these guidelines to enjoy prawns safely throughout your pregnancy:

Cook raw prawns thoroughly. Raw prawns should be cooked until they turn from grey and translucent to pink and opaque throughout. They should be steaming hot with no cold or translucent areas.
Check pre-cooked prawns carefully. Supermarket cooked prawns are safe if stored in the fridge and eaten within their use-by date. Do not eat them if they smell unpleasant or have been left unrefrigerated for more than an hour or two.
Avoid all-you-can-eat buffet prawns. Prawns that have been sitting in warm serving dishes are a food safety risk — bacteria multiply rapidly in warm conditions. If you cannot be sure prawns at a buffet or restaurant are freshly prepared and piping hot, it is safer to skip them.
Defrost frozen prawns in the fridge. If you are cooking from frozen, defrost prawns in the fridge overnight rather than at room temperature, and cook immediately after defrosting.
Prawn cocktail is generally fine. The pre-cooked chilled prawns used in prawn cocktail are safe as long as they are fresh, properly stored, and within their use-by date.

Nutritional Benefits of Prawns in Pregnancy

Prawns are a lean, nutritious food with several benefits during pregnancy:

Protein. Prawns are high in lean protein, essential for your baby's growth and development.
Iodine. Prawns are one of the better dietary sources of iodine, a nutrient many pregnant women do not get enough of. Iodine is essential for your baby's thyroid development and brain growth.
Selenium. Prawns contain selenium, which supports thyroid function and immune health.
Omega-3 fatty acids. Prawns provide some omega-3s, though in smaller amounts than oily fish like salmon or mackerel.
Low in mercury. Unlike some larger fish, prawns are very low in mercury, which makes them a safe seafood choice throughout pregnancy. The NHS recommends limiting oily fish to two portions a week due to mercury and pollutant concerns, but this limit does not apply to prawns.
Low in fat and calories. Prawns are one of the leanest animal proteins available, making them a good choice if you are conscious of maintaining a healthy weight during pregnancy.

Frequently Asked Questions

### Can I eat cold prawns from the supermarket when pregnant?

Yes — pre-cooked chilled prawns from the supermarket are safe in pregnancy provided they are within their use-by date, have been stored in the fridge throughout, and smell fresh. These prawns were cooked during processing and are not raw. Eat them promptly after purchase rather than leaving them in the fridge for several days.

Is prawn cocktail safe when pregnant?

Yes — prawn cocktail made with pre-cooked chilled prawns is safe in pregnancy provided the prawns are fresh and properly refrigerated. If you are ordering it in a restaurant, the prawns should have been kept chilled right up to serving.

What if I accidentally ate undercooked prawns while pregnant?

Try not to panic. Monitor yourself over the next few days for any symptoms of food poisoning: nausea, vomiting, diarrhoea, stomach cramps, or fever. If you develop a fever above 38°C, feel very unwell, or notice blood in your stools, contact your GP or call 111 and mention that you are pregnant so you can be assessed appropriately.

This article is for informational purposes only and does not constitute medical advice. Speak to your midwife or GP if you have personal concerns about food safety during pregnancy.

Last reviewed: June 2026

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