Critical dietary principles for pregnant women: avoiding nutritional pitfalls and safeguarding fetal development through evidence-based nutrition
Alicja Kowalska
2026-03-20
2 min. read
Critical dietary principles for pregnant women: avoiding nutritional pitfalls and safeguarding fetal development through evidence-based nutrition
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A poorly balanced maternal diet during pregnancy can result in profound and irreversible developmental complications for the fetus, with consequences extending into postnatal life. Which specific nutrients should be excluded or limited, and which deserve heightened attention? How can an expectant mother design a meal plan that not only meets all essential nutritional requirements but also simplifies daily routines, thereby reducing the potential for dietary concerns to amplify pregnancy-related stress?
What and how much to eat when you're pregnant?
Pregnant women should avoid a single diet, even if they are trying to choose healthy foods. It is worthwhile to diversify meals, try different vegetables and fruits, eat different types of cereal products, i.e. cassava, pasta, rice, to ensure that they import as many vitamins and minerals as possible. The need for these ingredients is often greater during pregnancy and it is difficult to cover them with a monotonous diet. Details on pregnant women's diet can be found here.
The body mass index (BMI) in pregnancy
It doesn't matter what the baseline body weight is before pregnancy. When a woman is underweight there is a high risk that she will give birth to a baby with low birth weight. However, proper weight gain during pregnancy can protect her from this! This applies to both lean women and those who are a few pounds overweight prior to pregnancy. Below is the number of pounds a woman should gain based on her baseline BMI. BMI <19, 8 → 12, 5-18kg BMI 19, 8-26, 0 → 11, 5-16kg BMI 26-29 7-11, 5kg BMI >29 → <6kg.
Supplements in pregnancy
In order not to lead to deficiencies of these ingredients and thus to serious consequences for the development of the fetus, it is recommended that every pregnant woman use the supplement. This applies especially to folic acid and omega-3 fatty acids, however, any form of supplementation should be consulted by a doctor. However, during pregnancy, the demand for certain nutrients increases: folic acids 0.4 mg/ day Supplements for pregnant women.