Define effect Micronutrients during pregnancy period?

The need for many vitamins and minerals is increased during pregnancy. Since energy intake increases, the requirements for few micronutrients needed for energy utilization i.e. thiamin, niacin, riboflavin and magnesium also increase. Since protein needs are higher, the requirements for vitamin Be and zinc also increase. Micronutrients involved in the growth and development of bone and connective tissue and the synthesis of new cells are needed in greater amounts.