There are some foods you should not eat when you're pregnant because they might make you ill or harm your baby.

Some types of cheese
Don't eat mould-ripened soft cheese, such as brie, camembert and chevre (a type of goat's cheese) and others with a similar rind, whether they are made using pasteurised or unpasteurised milk. You should also avoid soft blue-veined cheeses such as roquefort and gorgonzola. These are made with mould and they can contain listeria, a type of bacteria that can harm your unborn baby. Although infection with listeria (listeriosis) is rare, it is important to take special precautions in pregnancy because even a mild form of the illness in a pregnant woman can lead to miscarriage, stillbirth or severe illness in a newborn baby.

Don't eat cheese made from unpasteurised milk. You can eat hard cheeses such as cheddar and parmesan, and many types of cheeses made from pasteurised milk such as cottage cheese, mozzarella, feta, cream cheese, paneer, ricotta, halloumi, and processed cheeses such as cheese spreads.

Pâté
Avoid all types of pâté, including vegetable pates, as they can contain listeria.

Raw or partially cooked eggs
Make sure that eggs are thoroughly cooked until the whites and yolks are solid. This prevents the risk of salmonella food poisoning. Avoid foods that contain raw and undercooked eggs, such as homemade mayonnaise. If you wish to have dishes that contain raw or partially cooked eggs you should consider using pasteurised liquid egg.

Raw or undercooked meat
Cook all meat and poultry thoroughly so that there's no trace of pink or blood. Take particular care with poultry, pork, sausages and minced meat, including burgers. It is fine to eat whole cuts of beef and lamb such as steaks, cutlets and joints (but not rolled joints) rare, as long as the outside has been properly cooked.

Wash all surfaces and utensils thoroughly after preparing raw meat. It’s also important to remember to wash and dry your hands after touching or handling raw meat. This will help to avoid the spread of harmful bugs such as salmonella, campylobacter and E. coli 0157 that can cause food poisoning.

Liver products
Don't eat liver or liver products such as liver pâté or liver sausage, as they may contain a lot of vitamin A. Too much vitamin A can harm your baby.

Supplements containing vitamin A
Don't take high-dose multivitamin supplements, fish liver oil supplements or any supplements containing vitamin A.

Some types of fish
Don't eat shark, marlin and swordfish, and limit the amount of tuna you eat to:

• no more than two tuna steaks a week (about 140g cooked or 170g raw each), or
• four medium-sized cans of tuna a week (about 140g when drained)

These types of fish contain high levels of mercury that can damage your baby's developing nervous system. Don't eat more than two portions of oily fish a week. Oily fish includes fresh tuna (but not canned tuna), salmon, mackerel, sardines and trout. Local Bangaldeshi fish such Pangash, Aire fish are also very rich in oil which are good to have during pregnancy.

Raw shellfish
Eat cooked rather than raw shellfish as they can contain harmful bacteria and viruses that can cause food poisoning.

Peanuts
If you would like to eat peanuts or food containing peanuts (such as peanut butter) during pregnancy, you can choose to do so as part of a healthy balanced diet, unless you are allergic to them or your health professional advises you not to.

You may have heard that some women have, in the past, chosen not to eat peanuts when they were pregnant. This is because the government previously advised women that they may wish to avoid eating peanuts if there was a history of allergy (such as asthma, eczema, hayfever, food allergy or other types of allergy) in their child's immediate family.

This advice has now been changed because the latest research has shown that there is no clear evidence to say if eating or not eating peanuts during pregnancy affects the chances of your baby developing a peanut allergy.

Unpasteurised milk
If you have milk, drink only pasteurised or UHT (ultra-heat treated) milk – sometimes also called long life milk. If only raw (unpasteurised) milk is available, boil it first. Don't drink unpasteurised goat's or sheep's milk or eat food that is made out of them, such as soft goat's cheese.

Foods with soil on them
Wash fruit, vegetables and salads to remove all traces of soil and visible dirt.

Caffeine
High levels of caffeine can result in babies having a low birth weight, which can increase the risk of health problems in later life. Too much can also cause miscarriage. Caffeine is naturally found in lots of foods, such as coffee, tea and chocolate, and is added to some soft drinks and energy drinks. Some cold and flu remedies also contain caffeine. Talk to your doctor or pharmacist before taking these remedies.

You don't need to cut out caffeine completely but don't have more than 200mg a day. The approximate amounts of caffeine found in food and drinks are:

• one mug of instant coffee: 100mg
• one mug of filter coffee: 140mg
• one mug of tea: 75mg
• one can of cola: 40mg
• one can of energy drink: 80mg
• one 50g bar of plain (dark) chocolate: around 50mg
• one 50g bar of milk chocolate: around 25mg

So if you have, for example, one bar of chocolate and one mug of filter coffee, you have reached almost 200mg of caffeine. Don't worry if you occasionally have more than this amount. The risks are quite small. To cut down on caffeine, try decaffeinated tea and coffee, fruit juice or mineral water instead of regular tea, coffee, cola and energy drinks.

Sushi
It's fine to eat sushi and other dishes made with raw fish when you're pregnant as long as the fish used to make it has been frozen first. This is because occasionally fish contains small parasitic worms that could make you ill. Freezing kills the worms and makes raw fish safe to eat.

Sushi sold in shops or restaurants, whether it's ready-made or made in the shop, should be fine to eat. This is because the raw fish the shop uses to make sushi must have been frozen at minus 20C for at least 24 hours.

If you make your own sushi at home, freeze the fish for at least 24 hours before using it.
Some raw fish used to make sushi, such as smoked salmon, doesn't need to be frozen before it's used. This is because smoking kills any worms in the fish.

Cold meats and smoked salmon
Some countries advise pregnant women not to eat cold meats or smoked fish because of the risk of listeria. However, the risk of listeria is much higher with cheeses such as camembert, brie or chevre (a type of goat's cheese) and others with a similar rind, or pâté, which you shouldn't eat during pregnancy. However, if you are concerned, you might also choose to avoid cold meats and smoked fish while you are pregnant.