Pregnancy is an important step in every woman's life and giving birth is an unforgettable experience and finally getting known the child. Nutrition as well as exercise are important precondition for pregnant women and baby. Micronutrients are substances that are needed by our organism, but in very small amount. They are necessary for normal use of proteins, carbohydrates, fats and electrolytes. At different stages of pregnancy there are different nutritional needs for mothers and the baby. Therefore, it is important to choose a healthy and optimal diet during pregnancy, but also immediately afterwards. In the first three months energy needs are not significantly bigger, a varied diet is required because bone and blood veins and nerves are formed, the digestive system is formed, the heart is formed and the baby creates its own vitamin A reserves. In the second trimester pregnant women should have an additional 460 calories per day. In the last trimester the pregnant woman is preparing for the baby's birth. A proper diet for pregnant women allows better overview of weight gain and we can notice irregularities in the growth and development of the baby, as well as information about the feeling of pregnant woman. First days and weeks after childbirth are called puerperium. Nutrition in this period must include high-quality proteins and complex carbohydrates that will restore the maternal body to form before delivery. Therefore, it is important that the mother's food is quality and balanced and must eat regularly, moderate and varied. If vegetarians are breastfeeding, she must take supplements such as zinc, iron, riboflavin, vitamin B 12, D and calcium who are lacking in nutrition because they don’t consume meat.