Pregnancy Nutrition in Europe: Foods to Eat and Avoid by Trimester

Pregnancy nutrition advice can feel overwhelming — and confusing, especially when guidelines differ between countries. This trimester-by-trimester guide covers what UK and European healthcare guidelines actually recommend, which foods to avoid, and how to meet your nutritional needs at each stage of pregnancy.

General Principles of Pregnancy Nutrition

Before diving into trimester-specific advice, a few principles apply throughout pregnancy. The NHS and European Food Safety Authority (EFSA) both emphasise that most women eating a reasonably balanced diet do not need to dramatically change what they eat during pregnancy. What matters most is variety, food safety, and covering specific nutritional gaps that pregnancy creates.

Key supplements recommended throughout pregnancy in the UK:

• Folic acid: 400mcg daily until 12 weeks (women at higher risk may need 5mg — check with your GP)
• Vitamin D: 10mcg (400 IU) daily throughout pregnancy and breastfeeding
• Iodine: Not universally supplemented in the UK but important — dairy, fish, and eggs are the main dietary sources

First Trimester (Weeks 1–12): Building the Foundation

The first trimester is when the neural tube closes (weeks 3–4), making adequate folate critical even before many women know they’re pregnant. Morning sickness affects up to 80% of pregnant women, making it a challenging time nutritionally.

Priority nutrients in the first trimester

• Folate/Folic acid: Found in dark leafy greens, lentils, fortified cereals, and chickpeas
• Vitamin B6: May help with nausea — sources include poultry, fish, potatoes, and bananas
• Iron: Important from early pregnancy — red meat, lentils, spinach, tofu
• Iodine: Critical for fetal brain development — dairy, eggs, white fish

Managing nausea nutritionally

• Eat small, frequent meals to keep blood sugar stable
• Try cold foods if hot food smells trigger nausea
• Ginger (tea, biscuits, capsules) has modest evidence for reducing nausea
• Stay hydrated — sip water, diluted squash, or clear broths throughout the day

Second Trimester (Weeks 13–26): Growth and Energy

The second trimester is typically when energy returns and appetite increases. This is when fetal growth accelerates significantly and nutritional needs shift accordingly.

Priority nutrients in the second trimester

• Calcium: For fetal bone development — dairy, fortified plant milks, broccoli, almonds
• Omega-3 fatty acids (DHA): Critical for brain and eye development — oily fish (up to 2 portions per week), walnuts, flaxseed, algae-based supplements
• Iron: Blood volume increases substantially — ensure continued iron-rich diet
• Protein: Needs increase to around 70g per day — meat, fish, eggs, legumes, dairy, nuts

The NHS recommends continuing vitamin D supplementation and checking ferritin levels at around 28 weeks as part of routine antenatal care.

Third Trimester (Weeks 27–40): Preparation and Growth

In the third trimester, the baby accumulates fat stores and the skeleton mineralises. Maternal iron stores are drawn upon heavily, making iron intake particularly important.

Priority nutrients in the third trimester

• Iron: Risk of anaemia peaks in the third trimester — ensure dietary iron is adequate and supplement if recommended by your midwife
• Calcium and Vitamin D: Ongoing need for bone mineralisation
• Vitamin K: Important for neonatal blood clotting — leafy greens, broccoli, vegetable oils
• Magnesium: May help with leg cramps — nuts, seeds, whole grains, leafy greens

Foods to Avoid During Pregnancy

The NHS and Food Standards Agency (FSA) provide clear guidance on foods to avoid during pregnancy due to risks of listeria, salmonella, toxoplasmosis, or high vitamin A:

Avoid completely

• Raw or undercooked meat, poultry, and seafood
• Pâté (including vegetable pâté) — listeria risk
• Unpasteurised cheeses (soft mould-ripened cheeses like Brie and Camembert, blue-veined cheeses)
• Unpasteurised milk and dairy products
• Raw or partially cooked eggs not produced under the British Lion code of practice
• Liver and liver products — very high vitamin A, which can harm fetal development
• Shark, swordfish, and marlin — high mercury content
• Raw sprouts (including bean sprouts, alfalfa)

Limit

• Tuna: no more than 2 steaks (140g cooked) or 4 medium cans per week due to mercury
• Oily fish (salmon, mackerel, sardines, trout): maximum 2 portions per week due to PCB accumulation
• Caffeine: no more than 200mg per day (approximately 2 mugs of instant coffee)
• Alcohol: the NHS and most European guidelines recommend avoiding alcohol entirely during pregnancy

Vegetarian and Vegan Pregnancy Nutrition

Vegetarian and vegan pregnancies are nutritionally viable with careful planning. Key considerations:

• Vitamin B12: Essential and found almost exclusively in animal products — supplement is essential for vegans and recommended for vegetarians
• Iron: Plant-based iron (non-haem iron) is less well absorbed — pair with vitamin C and avoid tea/coffee with meals
• DHA/EPA: Found mainly in oily fish — algae-based omega-3 supplements provide a vegan source and are recommended by the NHS for vegans
• Calcium: Ensure adequate fortified plant milk, tofu, and leafy greens
• Iodine: Seaweed is not a reliable source due to variable iodine content — a supplement or iodine-containing pregnancy multivitamin is advisable

European Variations in Guidance

While UK NHS guidance forms the basis of this article, it is broadly consistent with recommendations from European national health bodies. Some differences exist:

• France: The French food safety agency (ANSES) recommends avoiding deli meats unless heated, and has stricter guidance on smoked fish due to listeria risk
• Germany: The German Nutrition Society (DGE) particularly emphasises iodine supplementation, as Germany has historically been an iodine-deficient region
• Scandinavia: Nordic guidelines are broadly similar to UK guidance but with strong emphasis on vitamin D given reduced sun exposure

Frequently Asked Questions

Do I need to eat for two during pregnancy?

No — this is a persistent myth. The NHS advises that women do not need any extra calories in the first or second trimester. In the third trimester, around 200 additional calories per day are recommended. Nutritional quality matters far more than quantity.

Should I take a pregnancy multivitamin?

A specific pregnancy multivitamin can be a useful insurance policy, particularly in the first trimester when nausea may limit food intake. However, it should not replace a varied diet. Check that any multivitamin does not contain vitamin A (retinol), which can be harmful in high doses during pregnancy.

Is it safe to eat sushi during pregnancy?

Raw fish carries a risk of listeria and parasites. The NHS recommends avoiding raw fish during pregnancy. Some sushi — such as prawn or cooked salmon rolls — is safe; raw fish options like salmon sashimi or tuna rolls should be avoided.