Eating a balanced and varied diet during pregnancy is crucial for a healthy pregnancy and for optimal growth and development of your foetus. The food and drinks you consume are the only source of nutrition for your foetus, making your dietary choices more important than ever.
The impact of maternal malnutrition
Poor nutrition during pregnancy, whether from overeating or undereating, can have serious consequences for both the mother and the developing foetus.
- Overnutrition: Consuming too many calories or unhealthy foods (e.g. deep-fried foods, sugary foods) can lead to excessive weight gain, which increases the risk of complications such as gestational diabetes and preeclampsia. Gestational diabetes may lead to a larger foetus, which may result in a difficult delivery, while preeclampsia is a dangerous condition characterised by high blood pressure that can affect multiple organs.
- Undernutrition: Not eating enough or not getting essential nutrients may lead to a range of issues. Undernourished pregnant women may experience maternal anaemia, leading to feelings of lethargy and weakness. Poor nutrition can also contribute to maternal stress and an overall decline in health.
- Risks to the foetus: Both over- and undernutrition can significantly impact the foetus. It can lead to intrauterine growth restriction (IUGR), where the foetus does not grow as expected, and impaired development of the brain and immune system, setting the stage for potential long-term health problems, e.g. diabetes mellitus, hypertension, heart disease, etc.
Nutritional tips for pregnant women
A well-rounded diet is the cornerstone of a healthy pregnancy. Focus on variety and nutrient density to support maternal and foetal health.
- Prioritise nutrient-dense foods: Aim to fill your plate with a variety of whole foods.
- Whole grains: Such as brown rice, oat, wholemeal bread, corn, and wholegrain cereals provide energy and dietary fibre.
- Vegetable and fruit: Offer a wide range of vitamins, minerals, antioxidants, and dietary fibre. Aim for a variety of colours to ensure a broad spectrum of nutrients.
- Legumes, nuts, and seeds: Excellent sources of protein, healthy fats, and essential minerals.
- Lean meats, poultry, fish, and eggs: Provide high-quality protein and iron. Opt for low-mercury fish like sardines, tilapia, or anchovies.
- Milk and dairy products: Important for calcium, protein, and vitamins such as vitamin D, A, and B vitamins. Go for pasteurised options. Pregnant mums may also choose maternal formulas with no added sugars and low GI and fat content for a healthier option.
- Focus on these micronutrients: Certain nutrients are particularly vital during pregnancy.
- Folate/folic acid: Crucial for preventing neural tube defects. Get it from leafy greens, citrus fruits, and fortified cereals.
- Calcium and vitamin D: Essential for strong bones and teeth development for your foetus. Vitamin D has been shown to reduce risks of pre-eclampsia and gestational diabetes. Sources include dairy products, fortified foods, and sunlight (for vitamin D).
- Iron: Needed to make red blood cells and prevent anaemia. Found in lean meats, poultry, fish, leafy greens, and fortified cereals.
- Docosahexaenoic acid (DHA), gangliosides, and milk fat globule membrane (MFGM): These components are vital for foetal brain and nervous system development. DHA is an omega-3 fatty acid found in fatty fish such as salmon and tuna, while gangliosides and MFGM are both compounds found in milk (and in some maternal formulas).
- Probiotics and prebiotics: A healthy gut microbiome is linked to better nutrient absorption and a strong immune system. Probiotics like Bifidobacterium lactis HN019 and prebiotics found in foods such as asparagus and banana can help support gut health.
- Limit/avoid these foods: Some foods can be harmful during pregnancy and should be consumed in moderation or avoided completely.
- Limit: Caffeinated drinks and sugary drinks/foods. Excess sugar intake may contribute to excessive gestational weight gain, gestational diabetes, and foetal macrosomia (large for gestational age). Check the ingredients list on the food label to see if there is any added sugar; opt for products with a “no added sugars” label.
- Avoid: Alcohol (can cause serious birth defects), raw or undercooked seafood, eggs, or meat (risk of bacterial contamination caused by Listeria monocytogenes), and unpasteurised juice, milk, or cheese (also a risk for bacterial infection).
Beyond diet: exercise is key
While diet is a major component of a healthy pregnancy, staying physically active is just as important. Regular, moderate exercise can help you manage proper body weight gain, improve blood circulation, reduce backaches, and prepare your body for labour. Activities like walking, swimming, and prenatal yoga are generally safe and beneficial. Always consult your doctor before starting or continuing an exercise routine during pregnancy. A balanced approach that includes a nutritious diet and regular exercise provides the best foundation for a healthy pregnancy
References:
- Naaz, A., & Muneshwar, K. N. (2023). How Maternal Nutritional and Mental Health Affects Child Health During Pregnancy: A Narrative Review. Cureus, 15(11), e48763. https://doi.org/10.7759/cureus.48763
- Dayan J (2024). The Impact of Malnutrition on Mothers and Children: A Comprehensive Overview. Matern Pediatr Nutr. 9:236. https://www.longdom.org/open-access/the-impact-of-malnutrition-on-mothers-and-children-a-comprehensive-overview-109042.html
- Eat healthy during pregnancy: Quick tips. Eat Healthy During Pregnancy: Quick tips – MyHealthfinder. (n.d.). https://odphp.health.gov/myhealthfinder/pregnancy/nutrition-and-physical-activity/eat-healthy-during-pregnancy-quick-tips
- Mayo Foundation for Medical Education and Research. (2025, January 31). Pregnancy diet: Focus on these essential nutrients. Mayo Clinic. https://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/in-depth/pregnancy-nutrition/art-20045082
