With adequate nutrition pregnant woman have to assure optimal intake of nutrients because this is an essential factor that has an impact on the health of pregnant woman and child. It is possible to prevent most of the disorders in children with balanced nutrition. Intake of macronutrients and micronutrients is significant as well as the intake of fluid. Proteins, carbohydrates and fat are macronutrients which means that an organism has a high demand for them. They provide the body with energy which measures in units called kilojoules or kilocalories. Vitamins and minerals are classified as micronutrients because they need in small amounts, in comparison with macronutrients, but they have a significant role in nutrition. Every vitamin has different biochemical function and participates in a lot of biochemical reactions, and lack of one of them can cause a particular disease. Most essential vitamins are folic acid, vitamin B12, vitamin C, vitamin D and vitamin A. Minerals have to be provided by food or water because the organism cannot produce them and their adequate intake is necessary for keeping the organism healthy. When speaking about minerals, great importance in pregnancy has iron, calcium, magnesium, and fluor. For this final thesis, the research about the nutrition of pregnant woman is conduct. The research aimed to find out if women have changed their eating habits in pregnancy if they know the importance of correct nutrition during pregnancy and do they know the importance of intake of trace elements and their influence on the growth of a fetus. The results have shown that women partially changed eating habits and that this change has no influence by the degree of education. More than half of women have answered that they know the importance of food supplements. This result is independent of age and education degree. Research has also shown that the number of pregnancies does not affect the increase in body weight.