Women who are pregnant, or who might become so, should carefully control their intake of nourishments as various building blocks of life become critical to achieve a healthy pregnancy. There is a growing recognition of the importance of the nutritional status of women during the reproductive period. In the first trimester of pregnancy, yolk sac plays a vital role in actively and passively transferring the nutrients to the fetus. In the second trimester, placenta plays a key role in transferring carbohydrates, water, ions, amino acids, vitamins and trace elements, which are essential for the development of a healthy baby.
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